Answer: fritted

AnswerCrossword Clue
frittedto fuse (materials) in making frit
fritteda. fused or partially fused material used as a basis for glazes or enamels b. the composition from which artificial soft porcelain is made
frittedFRIT, to fuse ceramically, also FRITT
frittedfused or calcined material prepared as part of the batch in glassmaking