Ceramics Intro 6th

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Introduction to Ceramics for 6th Grade

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  • Creator: Kenzan
    Title: tea bowl with design of plum blossom
    Title: tea bowl with design of plum blossom
    Date: 1615-1868
    Location: Japan
    Material: ceramic
    Material: glaze
    Material: enamel
    Measurements: 3 in. high
    Style Period: Edo
    Description: overview
    Collection: The John C. and Susan L. Huntington Archive of Buddhist and Related Art
    Source: Data From: The John C. and Susan L. Huntington Archive of Buddhist and Related Art, The Ohio State University
  • Ceramics Intro 6th

    1. 1. Ceramics
    2. 2. What is Ceramics? • Ceramics is the art of making objects out of Clay
    3. 3. Clay There are different types of clay Earthenware: This is a low-fire clay that is gray when wet and is white once fired –This is what we will be using
    4. 4. Seven Stages of Clay Wet Leatherhard Greenware First Fire Bisque Glaze Second Fire
    5. 5. Wet Clay • What do we notice about the clay at this stage? Describe. Try to build a tall skinny tower that stands straight up • At this stage the clay is soft and flexible because it is about 75% percent water • We do not want to build with clay at this stage because it is too soft. • There is no strength or structure to this clay (falls over and collapses, gets stuck to things)
    6. 6. Leatherhard Clay Now that you’ve played with the clay more, try making that skinny tower stand straight up again •After clay has been worked with and exposed to the air the water begins to evaporate, now it is only 50-30% water This is the perfect stage for building. The clay has structure and strength but is still workable for change. We love this stage and want our project to stay in this stage until we are finished working on it.
    7. 7. Greenware Clay • Greenware clay is clay that has been exposed to the air long enough for all the water to evaporate from the project. It is made of 0% water. In other words, it’s dry. -Once you have completed your project you will leave it unwrapped so it can enter the greenware stage. -Clay at this stage will hold its shape but is very fragile. What you have made is not just clay anymore, it is now a ceramic piece. *This is the last stage in which we can recycle the clay
    8. 8. First Fire • Once clay has completely dried out and has entered the greenware it is put into the kiln and fired. – A kiln is a ceramics oven. • Firing is when the temperature inside the kiln is brought up to about 1900 degrees (almost 4x hotter than a kitchen oven) This is a low fire temperature; high fire is about 2400 degrees
    9. 9. Bisque • Clay that has been through one firing in the kiln is called bisqued – This is clay that is permanently hard. There is no going back to workable clay after it has been bisqued. – The clay is now strong, but remember it’s still ceramic- be careful!
    10. 10. Glazing • Glazing is when you paint a thin layer of minerals and glass onto a bisqued ceramic piece. This will give your piece color and gloss. – Glazes look different when the come out of the jar then they do in the end. Look up the glaze on the tile to know what you’re using. – You can glaze the inside and outside of projects but not the bottom. If glazes are on the bottom they melt and glue themselves to the kiln.
    11. 11. Second Fire • After the glaze is painted on your ceramic piece it will go back into the kiln for a second fire. – The kiln heats up to only about 1700 degrees this time. – This changes the glazes to their final look.
    12. 12. Building with Clay
    13. 13. Techniques • There are four different techniques you can use when building with clay. –Pinch Method –Coil Building –Slab Building –Throwing/Pottery Wheel
    14. 14. Slab Building • To slab build you must roll out a piece of clay so that it has even thickness throughout • Then you score and slip the different slab pieces where you want to attach them • Coils should be rolled out and smoothed into joined corners for added support
    15. 15. Recycling Clay Clay scraps and unworkable dried out clay can be brought back to working clay by recycling it Clay is placed in buckets and left to soak in water Once soaked it can be wedged to new wet working clay Even if clay has entered the GREENware stage, it can be recycled

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