clay, clay, and more clay
Post on 17-Feb-2016
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CLAY, CLAY, AND MORE CLAY
Greenware Clay prior to firing
Leather Hard Clay has become more firm, but still
plastic enough to attach clay to it or carve into it
Bone Dry Clay has lost all plasticity
and moisture Can still be soaked in
water to regain moisture Clay must be bone dry
prior to being fired in the kiln
Clay is very fragile in this state
Bisque Firing The first round of firing clay Clay changes color and becomes hard It cannot be soaked in water to manipulate Now, it can be glazed
Glaze Firing What is glaze?
A surface coating on top of clay once it has gone through bisque firing
What is it made from?Glaze contains silica,
which forms glass
Glaze Firing Things to keep in mind while
glazingUse a soft bristled brush to
glazeIf the entire clay body is glazed
and set flat on the shelves in the kiln, the piece will adhere (stick) to the surface
Too little glaze will create an uneven coat and transparent look
Too much glaze will cause the glaze to run during glaze firing
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