Ceramic - Pottery Dictionary

by Susan Mussi

CRAZING - In glazes.

ca: CRAQUELAT - Eamalt

es: CRAQUELADO - Esmalte.

Crazing is when undesired hairline cracks appear in the glaze surfaces after firing. This is caused by the glaze having a higher expansion and so contracting more than the clay or bisque during the cooling down, forming cracks. If a glaze-base is prepared with this texture to use as a decoration, it is known as crackle.