白土 (Bai Tu) refers to a type of white clay that is primarily composed of kaolinite. This natural material is often used in pottery, ceramics, and traditional Chinese art. Its fine texture and ability to retain color make it a popular choice for creating delicate and intricate designs. In addition to its artistic applications, 白土 is also utilized in various industries, including cosmetics and pharmaceuticals. Its absorbent properties make it effective in products like face masks and ointments. Overall, 白土 plays a significant role in both cultural and commercial contexts.