Kaolin is a non-metallic mineral, which is a kind of clay and clay rock dominated by kaolinite clay minerals. Because it is white and delicate, it is also called dolomite. Its pure kaolin is white, fine and soft, with good physical and chemical properties such as plasticity and fire resistance. Its mineral composition is mainly composed of kaolinite, halloysite, hydromica, illite, montmorillonite and quartz, feldspar and other minerals.