Paper is made from cellulose fibers obtained from trees, recovered paper, and annual plants. The manufacturing process involves: (1) preparing pulp from raw materials through mechanical or chemical pulping; (2) washing, bleaching, and screening the pulp; (3) forming paper sheets using the pulp slurry; (4) pressing and drying the sheets; and (5) finishing operations like coating and calendaring. Quality control ensures consistently high quality paper. Today, about 97% of paper is made from wood pulp with hardwoods and softwoods as the main sources of cellulose fibers.
Ethnobotany, history of ethnobotany, aims and objective of ethnobotany, scope...halamobeen
in this presentation a brief note is given about what is ethnobotany. history of ethnobotany. what is the scope of ethnobotany. which are the aims and objective of ethnobotany. and also uses of ethnobotany.
Ginkgo is known as a Living Fossil.Anatomy of Ginkgo clearly shows primary and secondary structures. sex in Ginkgo is determined by sex chromosomes (XY in male and XX in female). Reproductive bodies of Ginkgo are most primitive among living seed plants except some Cycadales. Ginkgos are dioecious, with separate sexes, some trees being female and others being male. Male plants produce small pollen cones with sporophylls, each bearing two microsporangia spirally arranged around a central axis. Female plants do not produce cones. Two ovules are formed at the end of a stalk, and after pollination, one or both develop into seeds. The fertilization of ginkgo seeds occurs via motile sperm, as in cycads, ferns, mosses and algae.
Ethnobotany as an interdisciplinary science is, therefore, in a position to contribute to development of the wealth of traditional knowledge of the indigenous people concerning their natural systems and environment, their knowledge on utilization and maintenance of plant resources on a long-term basis without damaging or destroying their habitats.
Ethnobotanical data can be utilized by economic botanists to discover new plant resources, to provide fresh ideas for environment planners, as a tool for basic selection of plant species for development of drugs by pharmacologists, phytochemists and clinicians, as a new source of history through the study of plant names by linguists, as a source for locating new germ plasm for agriculturists, etc. Some works on ethnobotany performed only in last decades of 20th century.
Ethnobotany, history of ethnobotany, aims and objective of ethnobotany, scope...halamobeen
in this presentation a brief note is given about what is ethnobotany. history of ethnobotany. what is the scope of ethnobotany. which are the aims and objective of ethnobotany. and also uses of ethnobotany.
Ginkgo is known as a Living Fossil.Anatomy of Ginkgo clearly shows primary and secondary structures. sex in Ginkgo is determined by sex chromosomes (XY in male and XX in female). Reproductive bodies of Ginkgo are most primitive among living seed plants except some Cycadales. Ginkgos are dioecious, with separate sexes, some trees being female and others being male. Male plants produce small pollen cones with sporophylls, each bearing two microsporangia spirally arranged around a central axis. Female plants do not produce cones. Two ovules are formed at the end of a stalk, and after pollination, one or both develop into seeds. The fertilization of ginkgo seeds occurs via motile sperm, as in cycads, ferns, mosses and algae.
Ethnobotany as an interdisciplinary science is, therefore, in a position to contribute to development of the wealth of traditional knowledge of the indigenous people concerning their natural systems and environment, their knowledge on utilization and maintenance of plant resources on a long-term basis without damaging or destroying their habitats.
Ethnobotanical data can be utilized by economic botanists to discover new plant resources, to provide fresh ideas for environment planners, as a tool for basic selection of plant species for development of drugs by pharmacologists, phytochemists and clinicians, as a new source of history through the study of plant names by linguists, as a source for locating new germ plasm for agriculturists, etc. Some works on ethnobotany performed only in last decades of 20th century.
This powerpoint presentation gives knowledge about fiber yeilding plants namely, cotton, jute and flax. Also Gives details about their origin and the processing techniques.
Vascular Cambium & Seasonal activity & its Role in Stem & RootFatima Ramay
Vascular Cambium & Seasonal activity & its Role in Stem & Root:
The vascular cambium (pl. cambia or cambiums) is a lateral meristem in the vascular tissue of plants.
The vascular cambium is a cylindrical layer of cambium that runs through the stem of a plant that undergoes secondary growth.
In Dicots:
The vascular cambium is in dicot stems and roots, located between the xylem and the phloem in the stem and root of a vascular plant, and is the source of both the secondary xylem growth (inwards, towards the pith) and the secondary phloem growth (outwards).
In Monocots:
Monocot stems, such as corn, palms and bamboos, do not have a vascular cambium and do not exhibit secondary growth by the production of concentric annual rings. They cannot increase in girth by adding lateral layers of cells as in conifers and woody dicots.
Cambium of some plants remains active for the entire period of their life, i.e., cambial cells divide and resulting cells mature to form xylem and phloem elements.
This type of seasonal activity usually found in the plants present in the tropical regions, and not all plants show cambial activity.
Percentage of ringless trees in the rain forests of;India : 75%Amazon : 43%Malaysia : 15%
In regions with definite seasonal climate; seasonal activity of cambium ceased with onset of unfavorable conditions; In Autumn, it enters the dormant state and lasts for the end of summer; In Spring, cambium again becomes active.
Duration of cambial activity is also affected by day-length, e.g., In Robinia pseudoacacia, cambium is dormant under short-day condition.
The cambium cells formed in circular in cross section from the beginning onwards.
The cambial ring is partially primary (fascicular cambium) and partially secondary (interfascicular cambium).
Periderm originates from the cortical cells (extra stelar in origin).
In Dicot stem, for mechanical support xylem is with comparatively smaller vessels, greater fibers and less parenchyma.
More amount of cork is produces for protection.
Lenticels on periderm are very prominent.
The cambial ring formed is wavy in the beginning and later becomes circular.
The cambium ring is completely secondary in origin.
Periderm originates from the pericycle (intra stelar in origin).
In Dicot root, xylem is with big thin walled vessels with few fibers and more parenchyma.
Less amount of cork is produced as root is underground.
Lenticels on periderm are not very prominent.
A Manual on Corrugated Fiberboard BoxesYogesh Pandey
This manual is simple guide to understand the all the aspects of Corrugated fiber board boxes. This book covers following:
1. Introduction,
2. Brief Introduction about paper
3. Components of the corrugated board,
4. Manufacture of the corrugated box,
5. Nomenclature of the corrugated box,
6. Main features of CFB boxes,
7. Designing & Style of boxes,
8. Quality Parameters and their Attributes,
9. Defects in Corrugated boxes,
10. Testing of corrugated boxes
This powerpoint presentation gives knowledge about fiber yeilding plants namely, cotton, jute and flax. Also Gives details about their origin and the processing techniques.
Vascular Cambium & Seasonal activity & its Role in Stem & RootFatima Ramay
Vascular Cambium & Seasonal activity & its Role in Stem & Root:
The vascular cambium (pl. cambia or cambiums) is a lateral meristem in the vascular tissue of plants.
The vascular cambium is a cylindrical layer of cambium that runs through the stem of a plant that undergoes secondary growth.
In Dicots:
The vascular cambium is in dicot stems and roots, located between the xylem and the phloem in the stem and root of a vascular plant, and is the source of both the secondary xylem growth (inwards, towards the pith) and the secondary phloem growth (outwards).
In Monocots:
Monocot stems, such as corn, palms and bamboos, do not have a vascular cambium and do not exhibit secondary growth by the production of concentric annual rings. They cannot increase in girth by adding lateral layers of cells as in conifers and woody dicots.
Cambium of some plants remains active for the entire period of their life, i.e., cambial cells divide and resulting cells mature to form xylem and phloem elements.
This type of seasonal activity usually found in the plants present in the tropical regions, and not all plants show cambial activity.
Percentage of ringless trees in the rain forests of;India : 75%Amazon : 43%Malaysia : 15%
In regions with definite seasonal climate; seasonal activity of cambium ceased with onset of unfavorable conditions; In Autumn, it enters the dormant state and lasts for the end of summer; In Spring, cambium again becomes active.
Duration of cambial activity is also affected by day-length, e.g., In Robinia pseudoacacia, cambium is dormant under short-day condition.
The cambium cells formed in circular in cross section from the beginning onwards.
The cambial ring is partially primary (fascicular cambium) and partially secondary (interfascicular cambium).
Periderm originates from the cortical cells (extra stelar in origin).
In Dicot stem, for mechanical support xylem is with comparatively smaller vessels, greater fibers and less parenchyma.
More amount of cork is produces for protection.
Lenticels on periderm are very prominent.
The cambial ring formed is wavy in the beginning and later becomes circular.
The cambium ring is completely secondary in origin.
Periderm originates from the pericycle (intra stelar in origin).
In Dicot root, xylem is with big thin walled vessels with few fibers and more parenchyma.
Less amount of cork is produced as root is underground.
Lenticels on periderm are not very prominent.
A Manual on Corrugated Fiberboard BoxesYogesh Pandey
This manual is simple guide to understand the all the aspects of Corrugated fiber board boxes. This book covers following:
1. Introduction,
2. Brief Introduction about paper
3. Components of the corrugated board,
4. Manufacture of the corrugated box,
5. Nomenclature of the corrugated box,
6. Main features of CFB boxes,
7. Designing & Style of boxes,
8. Quality Parameters and their Attributes,
9. Defects in Corrugated boxes,
10. Testing of corrugated boxes
Paper industry Presentation
Things you want to include in this Presentation.
This presentation includes:
Paper History
Paper Making in China
Paper Making in Japan
Paper Making in Arabs
Paper Making in Europe
Definition of Paper
Requirement for Paper Making Industry
Manufacturing Method
Flow Chart of NSSC Paper Making Industry
Process For Paper Manufacturing
Application of Papers
Types of Paper
Energy Usage in Paper Making industry
Waste Generation Points
Air Pollution
Sources of Waste Water
Pollutants in Effluents
Treatment of Pulp and Paper Mill Waste
Recovery Process
Biological Treatment By Stabilization Ponds
Polymer induced Flocculation
Environmental Problem
How To Protect our Environment From
Hazardous of Paper industry
Organic Solvent Pulping
Acid Pulping
Biopulping
Elemental Chlorine Free (ECF) Bleaching
Management and disposal of solid wastes
Anaerobic Digestion
Composting
Steam Reforming
Wet Oxidation
Treatment of gas emissions
“How is the paper industry planning to reduce its carbon footprint?”
Recycling of Paper
it is about paper and pulp wood industry..it gives idea about processing of manufacturing of plywood....its too interesting....so download please...to create a own industry it will be too useful to you.....all the process given are so simple...and easy to understandable
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The paper and pulp industry is a vital sector of the global economy, producing a wide range of products used in everyday life such as printing and writing paper, tissue paper, packaging materials, and many more. The industry plays a significant role in providing employment and supporting local economies, as well as driving technological innovation and development. However, it also has a significant environmental impact, including deforestation, water pollution, and air pollution.
The process of producing paper and pulp begins with the harvesting of wood. Trees are cut down and transported to a pulp mill, where they are debarked and chipped into small pieces. These wood chips are then cooked in a chemical solution to remove the lignin, a substance that binds the wood fibers together. The resulting material, called pulp, is a slurry of fibers that can be used to make a wide variety of paper and paper-based products. This process is energy-intensive and can have a significant environmental impact (Keshav, 2014).
The paper and pulp industry is a major contributor to the global economy, with an estimated value of around $200 billion USD, and it is highly competitive, with a large number of companies operating globally. Some of the leading companies in the industry include International Paper, Asia Pulp & Paper, and Stora Enso (KPMG, 2018).
In Nigeria, the paper and pulp industry is one of the oldest and most established sectors, dating back to the early 20th century. The industry has been facing several challenges in recent years, including a lack of investment in new technology, insufficient raw materials, and high energy costs. Despite these challenges, the industry has been showing signs of recovery in recent years, with a number of new projects and investments being announced (Nigeria Investment Promotion Commission, 2020).
One of the major challenges facing the paper and pulp industry globally and in Nigeria is the growing demand for digital media, which has led to a decline in the demand for traditional paper products. This has put pressure on companies in the industry to adapt by developing new products and expanding into new markets. However, the demand for paper and pulp products is still high in developing countries, including Nigeria (KPMG, 2018).
In terms of sustainability, the paper and pulp industry is one of the major contributors to deforestation and air pollution. The industry has been criticized for its environmental impact, particularly its contribution to deforestation, water pollution, and air pollution. Companies in the industry have been working to reduce their environmental impact by using more sustainable sourcing practices, such as using recycled paper and pulp, and by improving their energy efficiency (Keshav, 2014).
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
2. Paper has a very interesting history. The ancient Egyptians in 2400 B.C. used the pith of a plant Cyperus
papyrus for preparing a paper-like vegetative parchment called 'papyrus' from which the word 'paper' is
derived. The Romans are also known to have used the Egyptian papyrus for writing purposes.
The first makers of paper were, however, the Chinese. The paper industry spread to India, Persia, and
Arabia from China.
Later, it spread to Spain and other European countries. In 1690 a paper mill was established in USA. The
Chinese made paper from pulp prepared by boiling old rags, silk waste, hemp, rice leaves, and bark of
mulberry trees.
The invention of a machine by French worker Louis Robert in 1799 for manufacturing paper and the
discovery by Frederic Keller in 1845 that ordinary wood could be converted into a paper pulp led to the
establishment of the modern paper industry.
Origin and History
1
3. Raw Materials
1
◦ The chief raw materials of paper are natural fibrous materials like wood fibers, cotton, and linen.
Cellulose in the pure form gives the best quality paper.
◦ Wood pulp composed of long and strong cellulose fibers is the most wanted raw material for the
paper industry.
◦ Spruces (Picea spp.), pines (Pinus spp.), aspens (Populus spp.), and the balsam fir (Abies balsamea) are
important wood pulp-yielding plants. Some hardwoods like beech (Fagus grandifolia), sugar maple
(Acer saccharum), and birch (Betula lutea) also furnish wood pulp.
◦ Other raw materials of minor importance are textile fibers of jute and hemp, wastes of the textile
industry, the esparto grass (Stipa tenacissima),paper mulberry, papyrus (Cyperus papyrus), bamboo
(Bambusa spp.), baobab (Adansonia digitata), Dephne cannabina, and Baib-grass (Eulaliopsis binata)
and a number of other plants and fibrous materials.
◦ Low-grade paper, strawboard, cardboard, pasteboard, etc. are produced from the fibrous stems of
wheat, rye, barley, rice, oats, and other grasses.
4. • Paper is made from cellulose fibers, which are obtained from trees,
recovered papers and annual plant fibers like cereal straws. Today
about 97% of the world's paper and board is made from wood-pulp,
and about 85% of the wood-pulp used is from hardwoods and
softwoods.
• Hardwoods are used as an ideal raw material for corrugated cases as
well as printing and writing papers.
• Softwoods offer longer fibers (average 3 mm compared with 1 mm
for hardwoods) and continue to be used for papers requiring the
highest strength characteristics.
• Paper is called board when it is heavier than 224 g/m2.
• Chemically pure cellulose consists of long, ribbon-like molecules
made up of smaller glucose units.
• Paper and board can be used in contact with food in many different
ways, either directly or indirectly, and either singly or laminated with
other materials such as plastic or metal foil. [1,2]
1. Introduction
1
5. 2. Manufacture of Paper
2.1 Pulp manufacturing
• Manufacturing of pulp starts with raw material preparation by debarking (in case of
wood), chipping, and other processes.
• Cellulosic pulp is manufactured from the raw materials, using chemical
and mechanical means. [3,4]
2.1.1 Mechanical Pulping
• Mechanical pulping separates fibers from each other by mechanical energy applied to
the wood matrix causing the gradual break of the bonds between the fibers
• In the mechanical pulping, the objective is to maintain the main part of the lignin in
order to achieve high yield with acceptable strength properties
and brightness casuing have a low resistance to aging.
• The main processes are Groundwood Pulping (GW) by pressing wood chips against
a rotating surface to grind off small pieces, Thermo-Mechanical Pulping (TMP), by
using high-temperature steaming before refining. [5,6]
2
6. 2.1.2 Chemical Pulping
• Chemical pulps are made by cooking (digesting) the raw materials, using the kraft (sulfate) and
sulfite processes.
• In the kraft pulp process the active cooking chemicals (white liquor) are sodium hydroxide (NaOH)
and sodium sulfide (Na2S).
• Kraft pulp possesses superior pulp strength properties in comparison to sulphite pulp.
• Kraft processes produce a variety of pulps used mainly for packaging and high-strength papers and
board.
• In the sulfite process Acid (bi)sulphite, Bisulphite, Neutral sulphite (NSSC), and Alkaline sulphite
are mainly used to attack and remove lignin.
• Mechanical pulps are weaker than chemical pulps, but cheaper to produce (about 50% of the costs
of chemical pulp) and are generally obtained in the yield range of 85–95%.
• Chemical pulping yields approximately 50% but offers higher strength properties and the fibers are
more easily breached because the mechanical pulping process does not remove lignin. [5,6]
3
7. 2.2 Pulp washing and screening
• To removes impurities and recycles any residual cooking liquor via
the pulp washing process. [5,6]
2.3 Bleaching
• Bleaching is any process that chemically alters pulp to increase its
brightness.
• The principal pulp bleaching agents are chlorine, chlorine dioxide,
hypochlorite, peroxide, chlorite, oxygen and ozone.
• The pulp is prepared for the paper machine including the blending of
different pulps, dilution, and the addition of chemicals.
4
8. 2.4 Pressing and Drying
• As the paper enters the press section, it undergoes compression between two
rotating rolls to squeeze out more water.
• Then it continues its way through the steam heated dryers losing moisture
each step of the way.
• About 90% of the cost of removing water from the sheet occurs during the
pressing and drying operations.
2.5 Coating/Calendering
• Coating is the treatment of the paper surface with clay or other pigments
and/or adhesives to enhance printing quality, color, smoothness, opacity, or
other surface characteristics. There is a great demand for paper with a very
smooth printing surface.
5
9. 2.6 Finishing
• At the end of the drying process, the sheet is smoothed using an "ironing" method, which consists of hot
polished iron rollers mounted in pairs with synthetic material rollers, one above the other.
2.7 Shipping
• The paper comes off the machine ready for reeling up into large reels, which can be cut or slit into smaller ones,
according to customer requirements.
2.8 Quality control
• to ensure that the paper or board is of a consistently high quality. Moreover, for food contact applications,
microbiological and chemical controls have to be carried out.
6
10. Reference
[1] Paine, F.A. and Paine, H.Y. 1992. A Hand Book of Food Packaging. Blackie Academic & Professional.
[2] Robertson GL. 1993. Food Packaging Principles and Practice. Marcel Dekker INC. New York
[3] Smook GA (1992a) Wood and chip handling. Handbook for Pulp & Paper Technologists, 2nd edn. Angus Wilde
Publications, Vancouver, p 20
[4] Biermann CJ (1996a) Wood and fiber fundamentals. Handbook of Pulping and Papermaking. Academic, San Diego, p
13
[5] Smook GA (1992b) Overview of pulping methodology. Handbook for Pulp & Paper Technologists, 2nd edn. Angus
Wilde Publications, Vancouver, p 36
[6] Biermann CJ (1996b) Pulping fundamentals. Handbook of Pulping and Papermaking. Academic, San Diego, p 55
[7] Smook GA (1992e) Paper manufacture – wet end operations. Handbook for Pulp & Paper Technologists, 2nd edn.
Angus Wilde Publications, Vancouver, p 228
[8] Biermann CJ (1996f) Paper manufacture. Handbook of Pulping and Papermaking. Academic, San Diego, p 209
[9] Smook GA (1992d) Preparation of papermaking stock. Handbook for Pulp & Paper Technologists, 2nd edn. Angus
Wilde Publications, Vancouver, p 194
[10] Biermann CJ (1996e) Stock preparation and additives for papermaking. Handbook of Pulping and Papermaking.
Academic, San Diego, p 190