It is used for making high quality Coated Abrasive products like abrasive waterproof paper,sanding cloth,sanding belt and so on. AP-17HGThis type of Brown Fused Aluminium grain is made from Ap-17A, it is calcined at 1000oC-1300oC, the grit inside crack will be well repaired after heating, the toughness also will be improved after heating. Then the grits will be well washed and carefully sieving ...