Clay of clay machine is generally formed by Silicate mineral after weathering on the earth surface

Clay of clay machine is generally formed by weathering of Silicate mineral on the surface of the earth. It is generally weathered in situ. It is called primary clay or primary clay if the particles are large and the composition is close to the original stone. This clay is mainly composed of silica and alumina. It is white and fire-resistant, and is the main raw material for preparing porcelain clay

The clay machine then continues to weather and become young, and then migrates through flowing water and wind, forming a thick layer of clay downstream, called secondary clay or secondary clay. This type of clay is polluted, contains more metal oxides, has a deep color, and a low fire resistance. Due to its good viscosity and plasticity, it is the main raw material for preparing clay

The kaolin of clay machine is a soft clay mainly composed of Kaolinite subgroup minerals. It is mainly composed of Kaolinite minerals. In nature, the minerals that make up kaolin are Clay mineral and non Clay mineral. The color is white, the highest whiteness is more than 95%, and the hardness is 1-4