Polishing powder is usually composed of cerium oxide (VK-CE01), Alumina (VK-L30F), silicon oxide (VK-SP50F), iron oxide, zirconia (VK-R30F), chromium oxide and other components, different materials of different hardness, the chemical properties in the water are also different, so the use of the occasion. The Mohs hardness of alumina and chromium oxide is 9, cerium oxide and Zirconia are 7, and iron oxide is lower.

Cerium oxide and silicate glass have high chemical activity and equivalent hardness, so it is widely used in glass polishing. In order to increase the polishing speed of cerium oxide, fluorine is usually added to the cerium oxide polishing powder to increase the grinding rate.

The mixed rare earth polishing powder with low cerium content is usually mixed with 3-8 fluorine, and pure cerium oxide polishing powder is usually not doped with fluorine. For ZF or F series Glass, because of its own hardness is small, and the material itself has a high fluorine content, so the choice of non-fluorinated polishing powder is good.