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Overly thick clay can also cause problems. Very thick pieces must be dried very slowly and very thoroughly before being fired. Thick, heavy sculptures are usually constructed of very groggy clay to aid in drying and to prevent cracking. For the purposes of this class, a piece with walls 1/2" thick should be the limit. By learning to work thinner and lighter your forms will become more expressive, and you'll have fewer problems with cracking.
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Jennifer Mathes, Ph.D. |