Visual Delights: Brenda B.Townsend
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material, such as sawdust, leaves, or paper. Lacking air, the organic material releases carbon gases that affect the body and glaze of the piece. Due to the severe drop in temperature when the piece is removed from the kiln, the glaze shrinks faster than the clay body. This causes "craze" lines (small cracks) throughout the piece. These hairline cracks are made prominent by the deposit of carbon in them – turning them black. No matter what color clay is used, the cracks and exposed areas of clay will turn black due to carbon deposits."
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