What is in porcelain clay?

Most porcelain contains a mixture of silica, clays, feldspar and kaolin. In the case of bone china, bone ash is also included. Porcelain is a ceramic and is made like all others by mixing clay with additives, shaping it and then firing it in a kiln. Where porcelain differs is the ingredient mixture, often containing kaolin and the fact that it’s fired at a hotter temperature. Shop a range of antique and vintage porcelain on 1stDibs.