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Souring: A process of organic breakdown which releases acids into the water of plasticity in a clay body. These acids bring about the flocculation of fine particles, thus improving the body's placicity and strength.
Stoneware: A high-firing clay body. Stonewares are fired to the point of vitrification, and are therefore much harder, stronger and more brittle than lower fired earthenwares
|Jennifer Mathes, Ph.D.|