... food grade (YS): Pharmaceutical tablets, sugar-coated, talcum powder and Chinese medicine prescriptions, food additives, isolation agent. (3) ... level (SL): for polypropylene, nylon, PVC, polyethylene, polystyrene plastic and polyester, and other types of fillers. (6) Rubber-(AJ): For ... porcelain, ceramic radio, industrial ceramics, architectural ceramics, and ceramics for daily use, such as enamel. (9 ...