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Results for vitrification:

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vitrification

CATEGORY: ceramics
DEFINITION: The melting and fusion of glassy minerals within clay during the high-temperature firing of pottery (above 1000 C), resulting in loss of porosity. It occurs when clay particles fuse together as glass -- a process starting between 800-900 degrees C and completed at about 1200 degrees C.

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earthenware

CATEGORY: ceramics
DEFINITION: Ceramics fired at temperatures high enough for vitrification to begin.