Mainly composed of kaolinite content of about 90%, mineral particle size less than 22m, micro-crystalline structure or Aphanitic often dense block or loose earthy aggregates. The main raw material for manufacture of porcelain. Clay (aka "Kaolin") - clay (H4Al2Si2O9) is the main raw material for ceramics. It is produced in the world of Chinese Jingdezhen kilns near kaolinite its name. Later, from the "kaolinite" in Chinese sounds evolved into "Kaolin", and become an international term. Pure clay is a white or gray, with silk-like luster soft mineral. Clay mica and feldspar by deterioration, in which the sodium, potassium, calcium, iron loss from changes with water, and this effect is called "clay" of or "kaolinised." What is causing the clay of As, in academia, although not yet conclusive, but can be considered roughly the spa or feldspar containing carbonated water and marsh plants corruption born when the gas works metamorphism. Generally prolific in clay or lime layer near the hot springs around, probably for this reason. Clay melting point of about 1780 ℃ or so, in fact, because many contain impurities, so it's slightly lower melting point. Our long-term to provide one-stop product testing services, in good faith for the sake of customers, help customers reduce risk, professional product testing and certification and provide realistic recommendations. In the modern technical and economic conditions, to an industrial scale extraction of metals from minerals processing or other products. Originally is from the metal deposits mined solids, has now expanded to accumulate in the rock after the formation of the sulfur, fluorite and barite are non-metallic minerals. Company: beautiful Detection Technology Services Ltd. Tel: 18038730506 (Ng) QQ: 2878656815 Fax: 86-0757-85553177