Kaolin or porcelain soil is a common name for mineral products that are wholly or essentially composed of mineral kaolinite or aluminum silicate. Grinded and graded grades of raw kaolin may contain small amounts of the corresponding silicates (mica, illite, chlorite, smectite) and quartz. This compound is mostly used in the coating industry and is washed with water to remove impurities. Kaolin has a clay structure, but unlike talc and mica, it is more valuable in the production of coatings than its contribution to its optical properties. In the continuation of the article in Jahan Chemi Physik, more details will be provided in this regard. Please be with us.