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Clay, Clay, and More Clay

Date post: 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 - PowerPoint PPT Presentation
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CLAY, CLAY, AND MORE CLAY
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Page 1: Clay, Clay, and More Clay

CLAY, CLAY, AND MORE CLAY

Page 2: Clay, Clay, and More Clay

Greenware Clay prior to firing

Page 3: Clay, Clay, and More Clay

Leather Hard Clay has become more firm, but still

plastic enough to attach clay to it or carve into it

Page 4: Clay, Clay, and More Clay

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

Page 5: Clay, Clay, and More Clay

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

Page 6: Clay, Clay, and More Clay

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

Page 7: Clay, Clay, and More Clay

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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