... one type of non-calcined Brown Fused Aluminium Oxide grain for coated abrasives application, the grain shape is very sharp ... by well water washing, AP-17 can be used for producing all kinds of coated abrasives products, such as ... 12, 16, 20, 24, 30, 36, 40, 50, 60, 80, 100, 120, 150, 180, 220.Microgrit Sizes Available (P):240 ... or ISO 6344-2: 1998 brown fused alumina for making sanding cloth jumbo roll