This document discusses some of the creative limitations faced by ceramic artists due to the properties of clay as their primary medium. It outlines how the plasticity and shrinkage of clay can negatively impact forms and designs during production by causing warping, cracking, or dimensional inaccuracies. Additionally, certain forms that are too thin, thick, attenuated, or have sharp angles/protrusions are difficult or impossible to achieve in clay without compromising structural integrity. While clay allows for creative expression, ceramic artists must work within the material constraints it imposes to produce stable and durable artworks.
This document provides information on clays and their use in pottery. It discusses the key types of clays used, including kaolin, ball clay, fire clay, and stoneware clays. It describes the physical and chemical transformations clays undergo during drying and firing, as well as the characteristics and properties of different clay bodies. The document also gives an overview of the history and types of pottery, and explains the stages involved in pottery making from forming greenware to bisque firing and glaze firing.
Ceramic tiles are made from clay that is formed, glazed, and baked. The process begins with crushing and grinding raw materials like sand, clay, and feldspar into a fine powder. This powder is mixed with water and other ingredients to form a slurry that is dried and then shaped. The tiles are then glazed by applying a glass-like coating and fired at high temperatures to strengthen them. Additional firing may be done after glazing to further harden the glaze. Finishing steps like grinding can be done to improve dimensional accuracy or the surface.
This document provides instructions for creating molds and casting duplicates of objects. It discusses:
- Casting involves creating identical copies of a master object through mold-making and pouring casting material.
- Common mold materials include silicone, plaster, resin, latex, with silicone being best for detail and longevity.
- Molds must be designed to allow duplicates to be removed without getting stuck on undercuts. This may require two-part molds or repositioning the master.
- A step-by-step process is described for making a two-part silicone mold for a resin piece, including adding keys to ensure proper alignment of the mold parts.
This document discusses different types of aggregates used in concrete. It begins by explaining that aggregates make up 65-75% of concrete's volume and were traditionally viewed as inert fillers, but are now understood to influence many concrete properties. It then describes various natural and synthetic aggregates in detail, including their sources, properties, and how they are produced. Key aggregate types discussed include lightweight aggregates like pumice and expanded clay, as well as heavyweight aggregates used in radiation shielding. The document emphasizes understanding aggregate characteristics and their effects on concrete.
This document provides an overview of various casting processes including expendable mold casting (sand, plastic, shell, plaster, and investment casting), plaster casting, sand casting, shell molding, investment casting, non-expendable mold casting (permanent, die, centrifugal, and continuous casting), and discusses factors such as cooling rate, shrinkage, and patternmaker's shrink. Key points covered include definitions of casting, molding, and solidification processes; materials and applications of different casting techniques; and how cooling rate and shrinkage are addressed in casting design.
This document provides information on clays and their use in pottery. It discusses the key types of clays used, including kaolin, ball clay, fire clay, and stoneware clays. It describes the physical and chemical transformations clays undergo during drying and firing, as well as the characteristics and properties of different clay bodies. The document also gives an overview of the history and types of pottery, and explains the stages involved in pottery making from forming greenware to bisque firing and glaze firing.
Ceramic tiles are made from clay that is formed, glazed, and baked. The process begins with crushing and grinding raw materials like sand, clay, and feldspar into a fine powder. This powder is mixed with water and other ingredients to form a slurry that is dried and then shaped. The tiles are then glazed by applying a glass-like coating and fired at high temperatures to strengthen them. Additional firing may be done after glazing to further harden the glaze. Finishing steps like grinding can be done to improve dimensional accuracy or the surface.
This document provides instructions for creating molds and casting duplicates of objects. It discusses:
- Casting involves creating identical copies of a master object through mold-making and pouring casting material.
- Common mold materials include silicone, plaster, resin, latex, with silicone being best for detail and longevity.
- Molds must be designed to allow duplicates to be removed without getting stuck on undercuts. This may require two-part molds or repositioning the master.
- A step-by-step process is described for making a two-part silicone mold for a resin piece, including adding keys to ensure proper alignment of the mold parts.
This document discusses different types of aggregates used in concrete. It begins by explaining that aggregates make up 65-75% of concrete's volume and were traditionally viewed as inert fillers, but are now understood to influence many concrete properties. It then describes various natural and synthetic aggregates in detail, including their sources, properties, and how they are produced. Key aggregate types discussed include lightweight aggregates like pumice and expanded clay, as well as heavyweight aggregates used in radiation shielding. The document emphasizes understanding aggregate characteristics and their effects on concrete.
This document provides an overview of various casting processes including expendable mold casting (sand, plastic, shell, plaster, and investment casting), plaster casting, sand casting, shell molding, investment casting, non-expendable mold casting (permanent, die, centrifugal, and continuous casting), and discusses factors such as cooling rate, shrinkage, and patternmaker's shrink. Key points covered include definitions of casting, molding, and solidification processes; materials and applications of different casting techniques; and how cooling rate and shrinkage are addressed in casting design.
Kaolinite is a clay mineral composed of aluminum, silicon, and oxygen. It forms layered structures and is the main component in china clay deposits. China clay is mined through opencast mining then undergoes refining and drying processes. It has a wide variety of industrial uses such as in ceramics, paper, paints, and more. The mining process begins with removing overburden, then hydraulic mining to extract the clay, which is then refined to remove impurities before being dried.
This document provides instructions for green sand casting metal objects at home. It describes the process of making a pattern, creating a two-part mold from sand in a flask, and pouring molten metal. Safety precautions are also outlined, such as using proper ventilation and protective equipment when working with hot metals and sand dust. The goal is to give hobbyists a way to cast aluminum parts for DIY projects in a safe manner using readily available materials.
Iaetsd study of cracks in structural concreteIaetsd Iaetsd
This document discusses various types of cracks that can occur in concrete structures. It describes cracks that can form in fresh/plastic concrete like plastic shrinkage cracks due to rapid evaporation or placement on hot surfaces. It also discusses cracks that can form in hardened concrete like drying shrinkage cracks due to restraint of concrete shrinkage or thermal cracks due to temperature differences. The document provides details on the causes and prevention of different types of cracks like using curing to prevent plastic shrinkage cracks or limiting loads to prevent overload cracks. It also describes methods to evaluate existing cracks in structures.
Cracks in concrete and its remedial measures kamariya keyur
Cracks in concrete can be caused by various factors like plastic shrinkage, drying shrinkage, thermal variations, chemical reactions, errors in design and construction practices, structural overloads, foundation movement, and vegetation. The document classifies cracks as structural or non-structural and describes different types of cracks that can occur before or after concrete hardening. It provides details on the causes and prevention measures for different types of cracks like plastic shrinkage, drying shrinkage, crazing, thermal cracks, cracks due to chemical reactions, and those arising from poor construction practices. The summary focuses on the key information around classification, types, causes and remedies of cracks in concrete structures.
This document discusses various types and causes of cracks in buildings. It classifies cracks as either structural or non-structural and further categorizes them based on their width. Common causes of cracks include moisture movement, thermal variation, excessive loading, and foundation settlement. Plastic shrinkage, bleeding, delayed curing, and use of poor quality materials can lead to cracks in concrete before it hardens. Thermal expansion and contraction from temperature changes is another major cause of cracks. Various remedial measures are proposed to prevent or reduce cracking in structures.
Self-healing concrete is the special type of concrete invented by a group of microbiology researchers under the head of henk jonkers. Bio concrete is also called as BACTERIAL CONCRETE or self-healing concrete. Its specially made to increase the lifespan or the durability of concrete structure by the self-healing action of that concrete
The document discusses various causes of non-structural cracks in concrete, including plastic settlement, plastic shrinkage, early thermal contraction, drying shrinkage, corrosion of reinforcement, sulfate attack, and alkali-aggregate reaction. It provides details on the mechanisms behind each cause and methods to mitigate cracking, such as mix design modifications, curing practices, and construction techniques.
The document discusses self-healing materials and strategies. It describes how nature inspired the concept of self-healing through cellular processes in bone that sense damage and repair it. The key aspects of self-healing materials are structural units that perform mechanical functions, are mobile to enable repair, and can sense damage. Examples discussed include self-healing in concrete through calcium carbonate formation in cracks and bacteria-stimulated crack healing. Self-healing coatings are also summarized that use encapsulated adhesives and reversible molecular bonds.
Fahad types and causes of cracks in concrete structuresFAHAD ALI KHAN
This technical seminar provides basic information about the various types of cracks in concrete and their potential effect on the long-term performance of concrete structures.
Concrete degradation and defects can occur due to a variety of reasons and have different effects. Common types of defects include honeycombing caused by ineffective vibration, concrete spalling due to corrosion of reinforcement bars, and cracking which frequently occurs on concrete surfaces from drying shrinkage or thermal contraction. These defects can be repaired but prevention is important, such as using adequate concrete cover and coatings on reinforcement bars to prevent corrosion. Left unaddressed, degradation and defects can negatively impact infrastructure through structural failures and collapse, putting lives at risk.
Reasons and solution to cracks in buildings.
<div dir="ltr"><br>Reasons and solution to cracks in buildings.<br><blockquote style="margin: 1.5em 0pt;"></blockquote></div>
The book covers various topics related to ceramics processing and technology. It discusses different types of ceramics like technical ceramics and fine ceramics. It also discusses fabrication processes for ceramic matrix composites using chemical vapor infiltration, liquid phase infiltration, and sol-gel processes. Additionally, it covers the properties and fabrication of carbon-carbon composites, metal matrix composites, and ceramic-ceramic composites. The book provides information on various ceramic forming and shaping techniques as well as application areas for ceramics.
This document summarizes a research proposal on using traditional ceramic motifs that produce sound to help passive children with autism. The study aims to identify the learning process and factors that influence learning for autism. It will measure the learning level and ways to improve learning for autism. The research design involves experimental research using stratified cluster sampling and interviews/observations as instruments. The goal is to stimulate auditory-visual coordination which autistic children have difficulty with by using traditional sound-producing ceramic motifs.
Cavender Creations provides specialized art and design services for unique commercial environments. The document outlines several of their projects including designing a film studio in Fort Worth for $150,000, Mexican restaurants for $95,000, and a bamboo garden installation in a Chicago hospital for $75,000. It also lists recent clients such as churches, golf clubs, hotels, and medical centers located in Texas, Illinois, Maryland, and California.
This document discusses research instruments used for data collection. It describes three common instruments: questionnaires, interviews, and observation. Questionnaires involve structured questions to elicit responses, while interviews can be structured, unstructured, or focused. Observation can involve participating or non-participating. The document provides examples of each type of instrument and discusses characteristics of good instruments, such as being valid and reliable. It also outlines steps to prepare questionnaires and types of questions used.
This document provides an overview of sculpture, including its definition, processes, materials, techniques and concerns. Sculpture is defined as the creation of three-dimensional forms by carving or modeling materials such as stone, wood, clay, metal and more. There are two main processes - subtractive, where material is cut away, and additive, where material is added to build up shapes. Key sculpting techniques include carving, modeling, casting and construction, while common concerns for sculptors are how pictorial, sculptural or built up a work is based on the medium and details.
This installation art piece explores themes of memory and forgetting in a dystopian future setting. It contains two main elements - a laboratory and an archive. The laboratory contains low-power radio transmitters, solar panels, a soup kitchen, hydroponics, and vertical gardens, representing survival tools. The archive houses a photocopier, USB drives containing "pedagogical materials", a library, and tables. Through this installation, the artist examines how art can shift from representation to social transformation and build hope for a more positive future.
Degradation of an object occurs as a result of the interaction between the environment or with the materials that form the object however, in the case of ceramics, environmental factors are the major cause. There are several ways in which ceramics break down physically and chemically.
This document discusses the use of waste glass aggregates in concrete as an innovative and environmentally friendly solution. It notes that civil engineering research is focusing on developing green concrete using unusual aggregate types like expanded glass granules made from waste glass. Using waste glass in concrete provides benefits like lower density, improved thermal insulation, and durability while also providing an eco-friendly use for glass waste that would otherwise be landfilled. The document reviews studies on optimal waste glass replacement ratios in concrete and the potential challenges like alkali-silica reaction that must be addressed to implement this type of glass aggregate concrete widely.
The document discusses the degradation of ceramics, which occurs through interaction with the environment. There are physical forms of degradation, like impact and frost damage, and chemical forms, such as degradation caused by water and soluble salts. The document provides tips to prevent degradation, like proper display, storage, and handling of ceramic objects. Environmental control is important to prevent physical and chemical breakdown of ceramics over time.
Kaolinite is a clay mineral composed of aluminum, silicon, and oxygen. It forms layered structures and is the main component in china clay deposits. China clay is mined through opencast mining then undergoes refining and drying processes. It has a wide variety of industrial uses such as in ceramics, paper, paints, and more. The mining process begins with removing overburden, then hydraulic mining to extract the clay, which is then refined to remove impurities before being dried.
This document provides instructions for green sand casting metal objects at home. It describes the process of making a pattern, creating a two-part mold from sand in a flask, and pouring molten metal. Safety precautions are also outlined, such as using proper ventilation and protective equipment when working with hot metals and sand dust. The goal is to give hobbyists a way to cast aluminum parts for DIY projects in a safe manner using readily available materials.
Iaetsd study of cracks in structural concreteIaetsd Iaetsd
This document discusses various types of cracks that can occur in concrete structures. It describes cracks that can form in fresh/plastic concrete like plastic shrinkage cracks due to rapid evaporation or placement on hot surfaces. It also discusses cracks that can form in hardened concrete like drying shrinkage cracks due to restraint of concrete shrinkage or thermal cracks due to temperature differences. The document provides details on the causes and prevention of different types of cracks like using curing to prevent plastic shrinkage cracks or limiting loads to prevent overload cracks. It also describes methods to evaluate existing cracks in structures.
Cracks in concrete and its remedial measures kamariya keyur
Cracks in concrete can be caused by various factors like plastic shrinkage, drying shrinkage, thermal variations, chemical reactions, errors in design and construction practices, structural overloads, foundation movement, and vegetation. The document classifies cracks as structural or non-structural and describes different types of cracks that can occur before or after concrete hardening. It provides details on the causes and prevention measures for different types of cracks like plastic shrinkage, drying shrinkage, crazing, thermal cracks, cracks due to chemical reactions, and those arising from poor construction practices. The summary focuses on the key information around classification, types, causes and remedies of cracks in concrete structures.
This document discusses various types and causes of cracks in buildings. It classifies cracks as either structural or non-structural and further categorizes them based on their width. Common causes of cracks include moisture movement, thermal variation, excessive loading, and foundation settlement. Plastic shrinkage, bleeding, delayed curing, and use of poor quality materials can lead to cracks in concrete before it hardens. Thermal expansion and contraction from temperature changes is another major cause of cracks. Various remedial measures are proposed to prevent or reduce cracking in structures.
Self-healing concrete is the special type of concrete invented by a group of microbiology researchers under the head of henk jonkers. Bio concrete is also called as BACTERIAL CONCRETE or self-healing concrete. Its specially made to increase the lifespan or the durability of concrete structure by the self-healing action of that concrete
The document discusses various causes of non-structural cracks in concrete, including plastic settlement, plastic shrinkage, early thermal contraction, drying shrinkage, corrosion of reinforcement, sulfate attack, and alkali-aggregate reaction. It provides details on the mechanisms behind each cause and methods to mitigate cracking, such as mix design modifications, curing practices, and construction techniques.
The document discusses self-healing materials and strategies. It describes how nature inspired the concept of self-healing through cellular processes in bone that sense damage and repair it. The key aspects of self-healing materials are structural units that perform mechanical functions, are mobile to enable repair, and can sense damage. Examples discussed include self-healing in concrete through calcium carbonate formation in cracks and bacteria-stimulated crack healing. Self-healing coatings are also summarized that use encapsulated adhesives and reversible molecular bonds.
Fahad types and causes of cracks in concrete structuresFAHAD ALI KHAN
This technical seminar provides basic information about the various types of cracks in concrete and their potential effect on the long-term performance of concrete structures.
Concrete degradation and defects can occur due to a variety of reasons and have different effects. Common types of defects include honeycombing caused by ineffective vibration, concrete spalling due to corrosion of reinforcement bars, and cracking which frequently occurs on concrete surfaces from drying shrinkage or thermal contraction. These defects can be repaired but prevention is important, such as using adequate concrete cover and coatings on reinforcement bars to prevent corrosion. Left unaddressed, degradation and defects can negatively impact infrastructure through structural failures and collapse, putting lives at risk.
Reasons and solution to cracks in buildings.
<div dir="ltr"><br>Reasons and solution to cracks in buildings.<br><blockquote style="margin: 1.5em 0pt;"></blockquote></div>
The book covers various topics related to ceramics processing and technology. It discusses different types of ceramics like technical ceramics and fine ceramics. It also discusses fabrication processes for ceramic matrix composites using chemical vapor infiltration, liquid phase infiltration, and sol-gel processes. Additionally, it covers the properties and fabrication of carbon-carbon composites, metal matrix composites, and ceramic-ceramic composites. The book provides information on various ceramic forming and shaping techniques as well as application areas for ceramics.
This document summarizes a research proposal on using traditional ceramic motifs that produce sound to help passive children with autism. The study aims to identify the learning process and factors that influence learning for autism. It will measure the learning level and ways to improve learning for autism. The research design involves experimental research using stratified cluster sampling and interviews/observations as instruments. The goal is to stimulate auditory-visual coordination which autistic children have difficulty with by using traditional sound-producing ceramic motifs.
Cavender Creations provides specialized art and design services for unique commercial environments. The document outlines several of their projects including designing a film studio in Fort Worth for $150,000, Mexican restaurants for $95,000, and a bamboo garden installation in a Chicago hospital for $75,000. It also lists recent clients such as churches, golf clubs, hotels, and medical centers located in Texas, Illinois, Maryland, and California.
This document discusses research instruments used for data collection. It describes three common instruments: questionnaires, interviews, and observation. Questionnaires involve structured questions to elicit responses, while interviews can be structured, unstructured, or focused. Observation can involve participating or non-participating. The document provides examples of each type of instrument and discusses characteristics of good instruments, such as being valid and reliable. It also outlines steps to prepare questionnaires and types of questions used.
This document provides an overview of sculpture, including its definition, processes, materials, techniques and concerns. Sculpture is defined as the creation of three-dimensional forms by carving or modeling materials such as stone, wood, clay, metal and more. There are two main processes - subtractive, where material is cut away, and additive, where material is added to build up shapes. Key sculpting techniques include carving, modeling, casting and construction, while common concerns for sculptors are how pictorial, sculptural or built up a work is based on the medium and details.
This installation art piece explores themes of memory and forgetting in a dystopian future setting. It contains two main elements - a laboratory and an archive. The laboratory contains low-power radio transmitters, solar panels, a soup kitchen, hydroponics, and vertical gardens, representing survival tools. The archive houses a photocopier, USB drives containing "pedagogical materials", a library, and tables. Through this installation, the artist examines how art can shift from representation to social transformation and build hope for a more positive future.
Degradation of an object occurs as a result of the interaction between the environment or with the materials that form the object however, in the case of ceramics, environmental factors are the major cause. There are several ways in which ceramics break down physically and chemically.
This document discusses the use of waste glass aggregates in concrete as an innovative and environmentally friendly solution. It notes that civil engineering research is focusing on developing green concrete using unusual aggregate types like expanded glass granules made from waste glass. Using waste glass in concrete provides benefits like lower density, improved thermal insulation, and durability while also providing an eco-friendly use for glass waste that would otherwise be landfilled. The document reviews studies on optimal waste glass replacement ratios in concrete and the potential challenges like alkali-silica reaction that must be addressed to implement this type of glass aggregate concrete widely.
The document discusses the degradation of ceramics, which occurs through interaction with the environment. There are physical forms of degradation, like impact and frost damage, and chemical forms, such as degradation caused by water and soluble salts. The document provides tips to prevent degradation, like proper display, storage, and handling of ceramic objects. Environmental control is important to prevent physical and chemical breakdown of ceramics over time.
Ceramic materials have been produced by humans for at least 24,000 years and are inorganic, nonmetallic solids formed through heating. Ceramics have a variety of properties including hardness, attractiveness, chemical inertness, and heat insulation. They are used widely in construction materials, decorative items, kitchenware, medical devices, and more. The production of ceramic tiles involves batching raw materials like clay and feldspar, grinding them, spray drying, pressing, drying, and high-temperature firing to form durable tiles.
This chapter discusses various handbuilding techniques for ceramics including pinch, coil, and slab construction. Pinch and coil construction were widely used in ancient cultures, while slab construction was more common in Mesoamerican cultures. Pinch forms can be delicate or thick, and coil construction can create almost any shape or form. Clay slabs can be used soft or stiff depending on the desired shape. The chapter provides guidelines for wedging clay, forming methods, surface effects, concentrating pressure points, and maintaining appropriate wall thickness.
The document summarizes a student project characterizing the properties of Ariyalur clay formation in India. It includes test results from several experiments performed on clay samples including Atterberg limits, sieve analysis, hydrometer analysis, unconfined compression test, and direct shear test. The results show the clay has properties similar to other deposits with poorly graded grain size and particles less than 0.075mm. A step-by-step procedure for characterizing the engineering properties of Ariyalur clay was developed and can be useful for engineering and economic purposes.
The document discusses the decline of traditional lime plastering skills due to modern gypsum plasters. It notes the need for more skilled plasterers who can work with lime and perform decorative plastering. While lime plastering skills are becoming rarer, the document argues that lime plastering is not too difficult to learn and that with basic understanding and practice, most plasterers can produce reasonable lime plastering. It provides guidance on appropriate lime materials and application techniques for traditional plastering.
This document discusses the effect of clay in rocks on asphalt performance. It defines clay as particles less than 4 micrometers in diameter, distinguishing it from dust which is particles less than 75 micrometers. Different types of clay minerals form in rocks and can impact asphalt differently, with some being relatively inert and others causing problems when they absorb water, like swelling. The document outlines standard tests for determining the presence of clay minerals and their impact on aggregate and asphalt properties.
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Clay is created through the decomposition of various rocks and minerals. It is structured with flat, disk-like particles that allow it to be molded when wet. Clay composition varies by source. Clay is used to make masonry units, tiles, and decorative architectural elements. Proper cleaning, identifying causes of deterioration, and using appropriate repair methods help preserve ceramic materials.
Microscopic inspection of pure metals and solid solutions. Saif al-din ali
1. Name of Experiment:
Microscopic inspection of pure metals and solid solutions.
2. The Objective of the Experiment:
To study the different shapes and sizes of grains and the flaws found in casts
The document experimentally studies the use of glass powder as a partial replacement for cement in concrete. Glass powder was used to replace cement at levels of 10%, 20%, 30%, and 40% by weight. The compressive, tensile, and flexural strengths of the concrete mixtures were then tested at ages up to 28 days and compared to a control concrete without glass powder. The results showed that glass powder can be used as a cement replacement up to a particle size of less than 75μm to prevent alkali-silica reaction, without negatively impacting the strength of the concrete. Using glass powder as a partial cement replacement provides an environmentally friendly way to utilize waste glass in concrete production.
Specific Ceramics Ltd manufactures vitrified tiles under the brand Durato. The company aims to blend design and technology expertise to provide cost-effective tile solutions. The plant is located in Gujarat with modern infrastructure. Raw materials like clays, quartz and feldspar are carefully selected and tested. The manufacturing process involves grinding, pressing, drying, firing and additional treatments. Firing at high temperatures of 1200°C forms the glass-like structure of vitrified tiles, making them resistant to wear, abrasion and frost. Quality control tests are conducted at the in-house lab to ensure product performance.
REPLACEMENT OF COARSE AGGREGATE WITH WASTE CERAMIC TILE AND COCONUT SHELL IN ...LokeshShirbhate2
This document summarizes a final project seminar presented by Lokesh Shirbhate on using ceramic waste and coconut shells as partial replacements for coarse aggregate in concrete. The project tested concretes with 5%, 10%, and 15% replacements and found that workability increased with replacement while compressive and flexural strength decreased linearly up to 15% replacement. It was concluded that coconut and ceramic wastes can effectively replace up to 15% of coarse aggregate, making concrete more economical and providing an outlet for waste materials. Future work may explore using these light weight concretes in construction applications.
This document provides an introduction to working with clay ceramics. It discusses that clay is created from the decomposition of igneous rock and involves the interplay of moisture, plasticity, and heat. The origins of ceramics date back to when people first learned to control fire. The document then covers properties of clay like plasticity, shrinkage, texture and moisture. It provides instructions for preparing clay, such as kneading or wedging to remove air bubbles. Various stages of clay are defined, from plastic to leather-hard to bisqueware and glazeware. Safety tips are also provided for handling clay.
Effects of Soil and Air Drying Methods on Soil Plasticity of Different Cities...IJERA Editor
Atterberg Limits were initially defined in 1911, by Albert Atterberg, a Swedish scientist. Their purposes are to classifying cohesive soils and determine engineering properties of soils. According to ASTM, all the soils tested by Atterberg limits should be oven dried, it is because drying the soils in different degree will alter their properties significantly. Some of the physical properties of soils will undergo changes that appear to be permanent. Therefore, the soil samples should be in natural or air-dried form. However, in reality, due to time constraint and other factors, many will run the tests by using soil samples that are prepared by oven drying method. They assumed that there is no difference between the results of two types of drying method. However, in reality, the properties of soil will be affected and thus give a misleading result. The objective of this study is to determine the effect of two drying methods, air-drying method and oven drying method, on the soil plasticity. Six soil samples from different cities were tested. These tests include sieve analysis, specific gravity test, hydrometer analysis, Plastic limit and liquid limit test. Conclusively, the oven drying method could not replace the air-drying method in soil preparation for both Atterberg limits tests.
Concrete construction article pdf waste materials in concrete (1)Mehul Vyas
This document discusses using various waste materials as aggregates in concrete, including broken glass, sawdust, plastics, mine wastes, and garbage. It provides examples of past successful uses of fly ash and sawdust concrete. It then examines using colored broken glass as an exposed aggregate for decorative or structural concrete. While broken glass works well for decorative concrete, tests replacing normal aggregates with glass in structural concrete significantly reduced its strength and durability. The document also discusses using other waste materials like mine tailings and garbage slag to make pressed concrete bricks.
IIIE SECTION A MANUFACTURING TECHNOLOGY NOTES 3.sand preparation and mould m...Bhaskar Nagarajan
Sand preparation and mould making involves using moulding sand composed mainly of silica to make moulds for casting metals. Natural sand collected from rivers and lakes can be used directly as green sand or processed further with binders like bentonite to make synthetic sand. Different sand properties like permeability, cohesiveness and plasticity are required for moulds. Common mould types include green sand, skin dry, and dry sand moulds made using natural moisture, partial drying, or no moisture respectively. Moulds are produced using bench, floor, plate, pit and machine moulding methods depending on the size and required production quantity of the casting.
Study of Suitability of Artificial sand in Plastering & ConcreteIRJET Journal
The document studies the suitability of different types of sand for use in plastering and concrete. Compressive strength tests were performed on cement mortar cubes made with natural sand, manufactured sand, silica sand, and blast furnace slag sand. Silica sand mortar cubes had the highest compressive strength. Acid attack and sulfate attack tests also showed silica sand mortar had higher strength than the other sand types. A finite element analysis was done to study the pullout pressure and temperature effects of plaster made with different sand mortars on a concrete block wall. Silica sand plaster showed higher normal elastic strain capacity compared to the other sands. The study concluded silica sand is the most suitable sand for use in
This document outlines a study on utilizing waste plastic to produce plastic sand-based tiles for pavement. It begins with an introduction to plastics and the problems posed by plastic waste disposal. The objectives are to develop an efficient plastic waste reuse system and produce affordable, durable pavement tiles. The methodology involves collecting, washing, chopping plastic waste, mixing it with sand, molding tiles, and curing them. Tests will evaluate the tiles' compressive strength, water absorption, and crushing resistance. The conclusion is that using plastic waste in construction materials can help reduce costs while improving waste management and the environment.
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A usability evaluation framework for b2 c e commerce websitesAlexander Decker
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A unique common fixed point theorems in generalized dAlexander Decker
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Design and Amenities
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University of Western Sydney degree offer diploma Transcript
Ceramic art, its sculptural possibilities and limitations
1. Arts and Design Studies
ISSN 2224-6061 (Paper) ISSN 2225-059X (Online)
Vol.14, 2013
www.iiste.org
Ceramic Art, Its Sculptural Possibilities and Limitations: The
Studio Experience
Dr. Vincent Egwu Ali
Department of Fine and Applied Arts
University of Nigeria, Nsukka
E-mail: alvin_egwu@yahoo.com
Abstract
Ceramic Art and Sculpture are two sister disciplines that explore clay as a medium for creative visual dialogue.
But unlike ceramic art which depends primarily on clay, sculpture exploits in addition other media such as metal
of all types, wood, cement and all kinds of found objects which predispose the sculptor to limitless and varied
creative possibilities. Some of these possibilities are lacking in ceramic art because of the nature of clay. Over
dependent on clay tends to limit the creative potentials of ceramists. Ceramic art is faced with certain creative
limitations which arise from the nature of material used, and which affect either positively or negatively the
forms produced, firing techniques and methods of production. In other words, these factors which are inevitable
control design in ceramic art. And considering the misconception cast on the creative potentials of the ceramist,
it has become imperative to identify and document them in a more detailed form in order for people to appreciate
the extent of their implications on the practice of ceramic art.
Keywords: Ceramic Art, Sculpture, Creative Possibilities, Creative Limitations
Introduction
Ceramic art happens to be one of the areas of the plastic art that lends itself to a lot of creative
potentials. The availability and abundance of clay, the basic raw material for pottery making in almost every
tribal culture, made many of the tribal cultures both in the past and present to adopt it as one major means of
expression. Clay has been in use since the prehistoric era thus making pottery one of the oldest arts practiced by
man.
However, the art of pottery has not been easy. Potters, even from the time of the primitive culture have
suffered many difficulties arising from the nature of materials used (particularly clay), forms, firing techniques
and production methods, which have always been discouraging. These factors, which are inherent in the ceramic
art, tend to limit the creative potentials of the ceramist. Thus, the subject of design in ceramic art has remained
static to some extent even in this age of experimentation, because clay, for instance, cannot be stretched beyond
certain limits. For instance, there is a global receptivity of the new concept of “installation” in art as easily
practiced in sculpture, but in ceramics this is practiced with difficulties imposed by the nature of clay. In a
developing country like Nigeria where potters still depend on bodies that are predominantly clay, the production
of ornamental wares as practiced in developed countries is difficult to exploit for this reason.
Nevertheless, while we strive to develop new techniques in spite of these difficulties, it is important to
highlight some of the problems or factors that give rise to them so that we can appreciate the efforts being made
by ceramists to remain afloat.
Nature of the Raw Material - Clay
The first problem that faces the ceramist arises from the nature of his raw material-clay. Clay is
fundamental in the practice of ceramic art and it has remained so since the beginning of the art. No material on
earth today has succeeded in replacing clay in the ease with which it can be shaped into objects of usefulness.
This is made possible because of its inherent qualities that are not possessed by other materials of similar origin.
For instance, rocks which are also derived from the earth's surface and which share almost the same chemical
properties differ considerably from clay in their physical properties.
Unfortunately, some of these qualities (physical properties of clay) are counter-productive in the
practice of the art. First, clay has the characteristic quality of yielding to pressure and taking any shape given to
it when the pressure is removed. This is referred to as “plasticity” In other words, plasticity is “the property
which allows the material to be deformed without cracking or breaking, under the influence of an applied force,
and to retain its new shape when the deforming force is removed or reduced below a certain value”1. Ryan notes
that “the problems of understanding and measuring plasticity have occupied much time of the research ceramist,
but this most important and fundamental property, without which many present shaping methods would be
impossible, is still not completely understood”2.
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Rhodes and Fraser in sharing the same view, however, note that a critical study under the electron
microscope has revealed that the clay particles are in form of thin plates, hexagonal in shape (plate-shaped
elongated in two dimensions),3 When water is introduced, it is the plate-like shapes of the particles that enables
them (particles) to slide easily over one another when pressure is applied and help retain their resultant positions
when the pressure is removed thus aiding the formation of a clay mass or object. In contrast, it will be noted that
earthy materials like finely ground sand, although will readily absorb water like clay at the surface of the
particles, but since these particles are not plate-shaped, they cannot slide easily over one another and that is why
sand has little or no plasticity.
Plasticity is an important character of clay, which marks it out from other materials. It means that if clay
is not plastic enough it cannot be useful in ceramic production, because such clay cannot respond to shaping,
especially by throwing and modeling. Therefore, there are certain degrees of plasticity that are desirable. Apart
from the non-plastic nature of some clays, there are still some that are excessively plastic. These two extremities
in the scale of the plastic property of clay affect design because of the problem arising from them, which lower
the quality of the product. For instance, if clay is excessively plastic it becomes sticky and difficult to
manipulate; with high shrinkage factor which will result in excessive cracking and warpage during drying and
firing of the clay object4. Unfortunately, only very few natural clay satisfies the plasticity requirement of the
studio potter, and that is why the issue of the proper adjustment and control of the physical property of the clay
to make it workable has been a vital aspect of ceramic production.
However, it is noteworthy that ceramists have not been able to develop an efficient method of
controlling the physical property of the clay. For instance, it is even difficult to determine which clay has the
required plasticity even after certain adjustment has been made. According to Rhodes a clay or clay body can
only be considered to be of the required plasticity after it had been used in production without difficulties5. In
fact, “many attempts have been made to develop a method for measuring plasticity, but so many factors are
involved, that no single method is entirely satisfactory”6. Ceramists “are in fact unable to measure plasticity, and
have no units to apply to it”7. In particular, the simple methods for measuring plasticity usually adopted by the
studio potter as recorded by Rhodes may give some indications of the plasticity of the material but they are by no
means entirely satisfactory, and the results can be misleading8.
Shrinkage is another characteristic of clay that can be counter-productive. Excessive plasticity results in
high shrinkage, which in turn affects the product during drying and firing. This is the most obvious reason why
the plasticity of the clay must be controlled. Shrinkage occurs during drying of the clay object and is always
related to the grain structure of the clay and therefore, also to plasticity. Shrinkage is induced by plasticity and
therefore any adjustment on the plasticity of the body is also intended to control the shrinkage of such body.
Shrinkage brings about the reduction in size of the clay product after drying and firing caused by the evaporation
of the water of fabrication and the chemically combined water in between the particles of clay, consequently the
particles draw closer and closer together; thus taking up the space which had been occupied by the water 9. With
high plastic bodies, that is, bodies that are predominantly clay, this reaction can be very dangerous especially if
the process is not gradual, because of the stresses set up which could lead to cracking and warpage Very often,
these faults do not become apparent until after firing.
In recent times, the issue of how to control shrinkage has become of great concern to the ceramist. Even
with the developments in technical ceramics the issue is still of paramount importance and has led to the
introduction of new methods of ceramic production and the use of other materials of little or no plasticity which
has been able to minimize some of the problems caused by shrinkage, However, in ceramic studios, where the
facilities and resources for effective control of shrinkage are lacking, the usual trial and error in the addition of
non-plastic materials to the clay has in most cases proved inefficient in controlling shrinkage. In Nigeria, for
instance, and in most parts of the world, studio potters are still practicing the method. At least for the time being,
the studio potters still make use of predominantly clay bodies with water as an essential ingredient for
fabrication.
Plasticity as an important property in ceramic production is inevitable particularly for the studio potters
who are specialized in the use of plastic bodies. In fact, plasticity enables clay-containing bodies to be shaped
without cracking and breaking, and retain the shapes after production. And since water must be removed before
the article can dry, shrinkage is inevitable. Therefore, it is impossible to eliminate shrinkage completely in a
body that contains clay; in essence, what the potter tries to do is to minimize the negative effects of shrinkage on
pottery products. On the other hand, since shrinkage is a natural phenomenon in such body, it implies that the
occurrence of the associated faults is likewise inevitable especially for those who are unable to understand the
physical behaviours of their clay bodies. Besides, a certain degree of shrinkage is needed for production when
clay body is involved. For instance, a small drying shrinkage is desirable in pottery bodies to allow the formed
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article detached from the plaster mould, thus making its removal from the mold easier. If this were not the case,
it would be impossible to produce clay objects from plaster mold.
In fact, to be precise, the potter contends with excessive shrinkage and, particularly uneven shrinkage,
which results in a number of faults; warpage and cracking being the most frequent ones. The term “warpage” or
“warping” is synonymous with distortion or loss of shape. Warpage refers to the loss of the original shape of the
clay object during drying and firing. The object is caused to twist from the usual or natural shape of the object. In
this case, the design is completely altered; while “cracking” refers to the partial separation of the wall of a clay
product. Both warpage and cracking can render the piece useless especially where tableware or liquid storage
container is involved. However, they can be allowed on ornamental piece, but where the crack is prominent and
has weakened the piece or may lead to eventual separation, the piece is discarded.
The presence of shrinkage also means that the accuracy of dimension to which an article can be made is
reducing, because where high accuracy or precision is required the moisture content of the body must be kept
low, or water eliminated10. Actually, this is what the industrial ceramist has been able to achieve by lowering
considerably the water content of its body or removing water completely and replacing it with organic binder
such as gum arabic, glue, starch etc. These are added to the powdery clay; the articles being made, using
advanced pottery equipment (Jollying and Jiggering, the Roller Machine, Isostatic Press, to mention but a few).
Unfortunately, these equipment are not yet within the reach of most studio potters, particularly those practicing
in a country like Nigeria, hence they are unable to produce wares of high accuracy in size. Therefore, the
inability of the studio potter to produce wares of a given specification arises from the constraint imposed by this
factor (shrinkage), which he could not control.
Apart from plasticity and shrinkage, clay as a medium for artistic expression also imposes certain
limitations on form or design. Even though it is easy to handle and gives room to many creative possibilities yet
clay has its own subtle ways of resisting careless handling. In fact, there seem to be too many forms or
possibilities to choose from in this age of artistic experimentation. In the past the potter had only a limited
number of forms available to him, and his expression was contrived in terms of these forms which are still
prevalent in traditional pottery with its characteristic spherical, hemispherical and oval forms derived from the
society’s environmental, mythical and religious attributes 11. The real problems is not making forms but the ease
with which they are made and their survival during and after production are certainly all that matter. It is
therefore necessary to avoid making forms that are not possible with clay medium, otherwise, ceramic
expression becomes more stressing and worthless venture. Consequently, because of the restrictions clay
imposes on the production of certain forms, potters concentrate on forms within the stretched limits of clay.
Nevertheless, clay as an obedient servant responds to certain forms of shaping. It can be moulded,
pounded, pinched, thrown, pressed, stamped, etc., which enables the potter to express his creative potentials
within the possible limits allowed by the clay. For instance Rhodes notes that
clay does not have the obdurate hardness of stone, the temperamental stringiness
of wood, or the hard-to-join quality of metal, but it has a fragility and
changeableness which require cuddling ... clay working does not tolerate
carelessness, thus even the most primitive clay-working procedures have been
directed by craftsmanship of a delicate sort, each pot has been nursed into
existence with some care. Merely to handle a raw, dried pot properly and to get it
into the kiln requires some tenderness towards it ... forms which are too
attenuated are not suitable to clay and forms which are too extreme may collapse
in the wet state before they can be finished12.
Fraser has also noted that:
it is important that wares should be of even section throughout-free of thick and
thin areas. Curves should be gently rounded instead of acute, and sharp angles
should be avoided … Holes cut or punched into the ware are weak spots. They
should be rounded instead of angular … Fluting or grooves cut into the ware will
weaken the structure as well as will the presence of any joints and attachments of
stuck-on additions 13.
Thin-walled pots are difficult to produce especially the big types. Thinness produces a weak wall so that the pot
IS unable to stand and will eventually collapse in the making process. Apart from producing weak wall there is
also the problem of fast drying; the areas produced earlier gets over dried in relation to the newly produced areas
which results in differential stresses built up on the wall of the pot causing it to warp, crack or even break apart.
Besides, such pots, particularly at the bisque stage, are fragile and risky because of the danger of chipping at the
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rims or handles. So, no matter how skillful the potter is, it is virtually impossible for him to produce a very thinwalled pot like that 'of sheet metals and some plastic containers.
On the other hand, wares that are too extreme or too thick become excessively heavy and drying is
hindered. Like the thin-walled pots, those that are too thick are also susceptible to collapsing during the making
process because of excessive weight. At the modeling and drying stages, it may seem these are the only
problems associated with thick pot, but during firing, the potter encounters a more serious problem. The danger
of explosions resulting from steam forming in the ware is greatly increased by thick-walled pots.
Today, the studio potter is faced with the problem of determining the right thickness to be given to his
pot; such that will not be prone to these faults. Even though some authors have suggested certain thicknesses,
derived from the type of bodies they used, and since shrinkage vary from body to body such thicknesses may not
be applicable to the type of bodies used by other potters, because clays from different locations rarely behave
alike owing to different levels of contamination. While some are moderately plastic others are excessively
plastic, etc. Even methods of production vary from potter to potter. While some specialize in modeling, others
may be more interested in throwing and casting. The rates of drying or degree of shrinkage of wares produced
through these methods vary also. Therefore, the potters are not guided by any laid dawn rules or principles to
determine the thickness of their wares. That is why the thickness of the wares produced by studio potters varies
from person to person. What the potters have been doing is the usual trial and error, which proves unsuccessful
most of the times.
Pottery forms are not expected to have what the potters refer to as ‘weak points’ or ‘weak spots’. As
reported by Fraser, ‘weak point’ is any sharp edge or protrusion from the wall of the pot, which has the tendency
to chip off during handling or with slight knock, even after the pot has been gloss fired 14. The more rounded the
pots are, the better their walls can withstand knocks. During firing, rounded pots are more resistant to thermal
shocks. “Sharp edges and corners imply high stress concentration, and should therefore, be avoided”15. Bowls
and plates should have semicircular edges for better chipping resistance. Handles and spouts are better treated so
that they do not become weak points. In most cases, weak points help to enhance the beauty of the pot but since
they are likely to breakaway with time thereby ruining the pot, it is advisable to avoid them.
Forms that are tilted excessively will collapse during firing especially at high temperatures (fig. i). At a
certain stage in the firing process (i.e during vitrification), the clay particles become loosely compacted
weakening the form and if the form is inclined considerably it will bend, warp or collapse completely. In
addition, potters avoid long appendages that lie horizontal or at 90 degrees to the surface of the pot because they
are more prone to these faults (fig ii). In other to minimize these faults, potters favour those forms and long
appendages that lie not less than 60 degrees to the horizontal (fig. iii).
In the same vein, forms whose bases occupy large surface areas than other parts are prone to warpage
and cracking during drying and firing 16. When the base of the pot is flat and too large in relation to its wall the
shrinkage is usually with some difficulty. Cracking and warpage have more chances of developing when the
ware shrinks with difficulty. This is why studio potters avoid the production of large tiles, plates and trays. The
rim of these forms dry differently from their base centers and that is why they have few chances of survival.
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Most pottery wares are designed to serve specific functions. Such wares have certain attributes that
enable them to perform these functions, which mean that any attempt to deviate from this standard will render
the ware useless. For instance, for a cup to be handled with ease when in use it should have a handle. Likewise,
spout and handle are fitted to the water jug to enable it serve water effectively. A part from these appendages, the
form proper should be such that will enhance the functionality of the ware. While a spherical form will serve as
cup with difficulty, a short cylindrical form is already a cup even without a handle.
This is the area where there is a kind of disagreement among the potters; while some adhere strictly to
these basic design principles, others mainly the new generation potters, believe that any form can be used
provided it can serve the purpose for which it is made. These new generation potters hide under the cloak of
creativity to neglect some of these design principles. There are those who, for instance, produce a cylindrical cup
and affix animal form to it as handle. Nowadays, forms that look like shrine objects are being presented as
tablewares. Even in decoration, hygienic aspect of ceramic production is no longer being taken seriously. How
can one produce a tableware with a badly textured surface forgetting that such surface will hide dirt and may be
difficult to wash. Even a layman knows that the eye will eat first before the mouth, which means that when the
food appears tasty it encourages the appetite. Also, when a tableware has a dirty glazed surface as a result of
discoloration people would not like to possess it because of the fear of food contamination. No wonder when
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some people look at some of these forms, they ask questions that suggest that they cannot be used to serve table
except for decorative purposes.
The point is not that potters should not be creative, after all there is the sculptural aspect of the
profession which offers the potter a wide range of creative vision, but it is important to note that when it comes
to utilitarian wares, certain degree of caution is required so that those in generations to come will not lose track
of these basic principles thereby hindering them from the potters primary function of contributing to the
provision of the utilitarian needs of the society.
There is also the problem of producing large heavy works for outdoor use, for instance, in ceramic
gardens and landscapes (see Karin 2000). Karin affirms that large clay works “are not only heavy but often bulky
and complex in shape which makes them difficult to manoeuvre and they may not easily fit into the kiln”17. The
idea of breaking the form into small manageable modules which can be assembled after firing to build a single
large form can result to distortion if not carefully executed. It can be risky too, because if a module is broken the
entire form is lost.
Limitations Arising from Firing
Firing is perhaps the operation least understood and least controlled in pottery production. The failures,
accidents and frustrations being experienced in this process by the studio potter is better understood in the words
of Rhodes.
For potters, the firing process has always been a matter of intense concern, perhaps
because of the uncertainties attending it. Placing one’s pieces in the kiln is a kind of
surrender, a giving up to the metamorphic forces of the fire. All ceramists feel a sense
of excitement when the kiln is opened, but most also experience a feeling of letdown
and depression after the pieces have been removed from the kiln and inspected.
Firing is critical, and when it is successful the fruits of all the other processes are
reaped. But by the same token, if it fails all else is canceled and accounts for nothing.
Unfortunate accidents to the ware have brought considerable anxiety to the potter.
The suspense of awaiting the final results of one’s labours with the opening of the
kiln is the central experience of the ceramist. To be a ceramists is not only to
understand but to feel this transformation of the fire, and to be able to live with it,
work with it, and to collaborate with it. .. only experience will enable the kiln watcher
to cope with the unexpected 18.
Firing is an important aspect of the production processes because that is what gives value to the ceramic
products. Clay objects can only be useful after they have been subjected to heat treatment. Firing renders pottery
products hard, rocklike, and impervious to water. It is only at this state they can be valuable. If this were not the
case, it would be useless to make objects from clay.
Unfortunately, firing is the most risky aspect of ceramic production because it can ruin the wares. Most
of the reactions that take place in the kiln during the firing circle are not within the control of the potter, which is
why a lot of uncertainty surrounds the process. Potters are yet unable to master and control the mysteries
associated with firing. It is regrettable, however, that in spite of the effort put in careful management and control
of the kiln during firing still a number of things go wrong.
The studio potter is perhaps the most badly affected as he is constrained to adopt firing method that is
made possible by the equipment and resources available at his studio. Unlike the industrial potter the studio
potter biscuits his ware at a very low temperature of about 800-900°C. At this temperature most of the reactions
that affect the product have not been completed, thus when the ware is subsequently subjected to a gloss firing of
a higher temperature of about 1100-1250°C these reactions continue in the gloss firing so that there is more
chances of loss than there is with the method adopted by the industrial potter. Industrial potters adopt the reverse
technique whereby the ware is biscuit at a higher temperature and gloss fired at a lower temperature.
The advantage this has over the studio potter’s technique is that since the body will have been fired to
its maturing point on the first firing, any fault, mainly cracking, warpage or distortion must have been completed
at the biscuit stage. Those wares having faults must have been sorted out and do not form part of the gloss firing.
The risk of loss arising from these faults is completely eliminated 19. In fact, the only advantage the studio
technique has is that the wares are of good porosity, which enables them to pick-up, a good film of glaze during
the dipping operation mainly employed by the studio potter. But the industrial potter is able to overcome glazing
problems associated with his non-porous bodies by using sophisticated equipment and materials.
In fact, the most common problems that arise from firing originate from the nature of clay. Further
shrinkage occurs during firing, caused by the completion of drying and the re-arrangement of the clay particles.
This is considered a very critical point in the firing process because at this stage the ware is prone to cracking
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and warpage At this point, there is also the danger of explosions resulting from steam built up in the ware
particularly wares with thick walls or heavy cross sections.
“It must be borne in mind that many clays”, particularly the secondary clays “are impure and these
impurities have a marked effect on the products”20. Primary clays are the types widely favoured by the studio
potters because they are common, easy to procure and inexpensive to prepare. The presence of iron oxide in the
clay is of great concern to the ceramist. Iron is the material, which most affects the colour of glazes, and this is
present in all secondary clays in amounts, which vary from 8 percent for red earthenware, to 2-3 percent for
stoneware 21.
However, for the studio potter specializing in the production of clay sculptures, most of the effects of
iron on glazes can be very interesting and such potter tends to accept iron in his clays. But in the production of
table wares, where a high degree of purity or whiteness is required, iron oxides is regarded as a very troublesome
impurity For instance, white coloured wares are difficult to produce with clays contaminated with iron. Iron
oxide attacks the colour of glazes resulting in discolourations and specks, which sometimes appear dirty looking
on the surface of the ware. Therefore, the inability of the studio potter to produce wares with clear coloured
glazed surface is caused by the presence of iron oxide in his clay.
Finally, for the studio potter, what comes out of the kiln appear as strange objects, quite beyond his
power to visualize or predict. Sometimes, the kiln confers graces on the object, which exceed even the potter’s
imaginations. In the production processes, the potter employs all he could to ensure success. still the fire is the
final arbiter that determines what happens at the end.
Conclusion
This paper has shown the studio potter, unlike the sculptor contends with a lot of hindrances during the
production processes some of which has been highlight Evidently, majority of these problems, which are purely
technical, originate basically from the nature of the fundamental raw material-clay. Virtually all the physical
behaviours of clay that are necessary for pottery making are also responsible for most of the faults found on the
product. Unfortunately, the studio potter, particularly in Nigeria, is not in a position to control the faults owing to
financial constraints precipitated by his level of pottery practice, and consequently these have continued to
influence negatively the quality of designs and his creative potentials when compared with the sculptor.
References
1.
Ryan, William Properties of Ceramic Raw Materials, England, Pergaman Press, 1978, p 13.
2.
Ryan, Properties of Ceramic Raw Materials, p 21.
3.
Rhodes, Daniel Clay and Glazes for the Potter, London: Pitman Publishing Limited, 1975, p 9; and
Fraser Harry Ceramic Faults and their Remedies, London, A & C Black Publishers, 2005, p 19.
4.
Rhodes Clay and Glazes for the Potter, p 14.
5.
Rhodes Clay and Glazes for the Potter.
6.
Worral W.E Ceramic Raw Materials, England, Pergamon Press, 1982, p 44.
7.
Ryan Properties of Ceramic Raw Materials, p 21.
8.
Rhodes Clay and Glazes for the Potter, p 66
9.
Rhodes Clay and Glazes for the Potter, p.14 and Rado Paul An Introduction to the Technology of
Pottery, England, Pergamon Press, 1988, p 84.
10.
Ryan Properties of Ceramic Raw Materials, p 27.
11.
Ali Vincent “Igbo Traditional Pottery: Types, Forms and Functions”, Uso: Nigerian Journal of Art,
2001, Vol 3, No. 1 & 2, p 22.
12.
Rhodes Clay and Glazes for the Potter, p xviii.
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ISSN 2224-6061 (Paper) ISSN 2225-059X (Online)
Vol.14, 2013
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13.
Fraser Ceramics Faults and their Remedies, p 84.
14.
Fraser Ceramics Faults and their Remedies.
15.
Rado An Introduction to the Technology of Pottery, p. 207.
16.
Fraser Ceramics Faults and their Remedies.
17.
Karin Hessenberg Ceramics for Gardens and Landscapes, London, A & C Black Publishers, 2000, p
140.
18.
Rhodes Daniel Kilns, Construction, Design and Operation, London, Pitman Publishing Limited, 1977,
p 197.
19.
Fraser Harry Electric Kilns and Firing, London, Pitman Publishing, 1980, p 56-57.
20.
Worral Ceramic Raw Materials, p 26.
21.
Cooper Emmanuel Electric Kiln Pottery: The complete Guide, London: B.T. Batsford Limited, 1982, p
41.
38
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