China clay is Hydrated aluminum silicate earthy mineral containing chemical formula as Al2O3*2SiO2*2H2O , it is formed over many millions of years by hydrothermal decomposition of granite rocks, China clay generally soft, earthy and usually white minerals in nature, The china clay also known as KAOLIN and it was first discovered in the mountainous of Kiangsi, China. The word “KAOLIN” derived Chinese character “ Kao Lin “ which means high ride, it was first used by the Chinese to make high quality porcelain .