Kaolin in the Maoming area and the kaolin in the Maoming basin belong to the sedimentary rock weathering residual subtype deposit, and its quartz sand content is more than 50%, so it is called the sandy kaolin. The Maoming kaolin has been weathered and self grinded from the cause of weathering, and the weathering of the kaolin is three stages. The weathering of the kaolin is complete. The wafers are mainly single flake, and the grain size is fine. Mainly for paper making materials.