We are a new corundum producer in South China, we are able to supply black corundum, which is a new type abrasive material for polishing various metal. It is the second hardest natural mineral. The hardest mineral, diamond is still four times harder than corundum. The hardness of corundum can be partially attributed to the strong and short oxygen-aluminum bonds.
Due to its high hardness, high durability, strong tenacity, good self-sharpening, less power weakened in grinding, and so on. Therefore, it can be used in grinding and polishing stainless steel, optical glass, it is also the new grinding material of producing colophony grinding wheels and emery cloth.
The size of our black corundum is 24-400 Mesh. If you are interested in our product, please contact with me as soon as possible.