... producing vitrified and resiniod grinding wheels and high quality abrasive cloth.WHITE ALUMINIUM OXIDE (WA) is used ... carbon steel, alloy steel, etc.With high toughness, black aluminum oxide is extremely suitable for polishing stainless steel ... effect is much better than many of other abrasive materials.Black silicon carbide(C) is used to grind ... as gem, optical glass, ceramics, etc. ABRASIVE MATERIAL