CHINA CLAY
China clay as the name indicates, comes from China and is well known for its whiteness and strength in bodies but firing higher than 1200º C could cause discoloration in glazes. It cannot be used in its natural state, but is an important and common ingredient for other clay bodies as it gives whiteness to earthenware, stoneware, porcelain and bone china and helps control the vitrification. When vitrified and ground down it is used as grog. It is used for all types of work but especially for slip casting and should not be fired higher than 1200º C. It is also the base for porcelain.
