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Example of Crazing in Pottery Glaze

- Jay B. Siegel
Definition: fine cracks in the glaze or surface layer of pottery and porcelain wares, some plastics, and composition materials (such as the face of a composition doll); caused by the difference in the contraction rate between the body of an object beneath the surface layer of glaze; can be caused by improper storage in extreme temperatures or an abrupt change in temperature where an antique or collectible is stored; usually diminishes the value of objects depending on the severity of the crazing and rarity of the crazed piece
Also Known As: craze lines
Crazing diminishes the value, sometimes significantly, of all but the very rarest antiques and collectibles in which it occurs.

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