~Barium sulfate( super-fine barium sulfate is produced with advanced production techniques, processed with phiscal and chemical means, has good whiteness, high purity dispersibility and compatibility; can absorb X-ray, and endow the materials with high density and surface finish, therefore widely used in paints, printing ink, coatings, plastics, rubber, chips, friction plate, ceramics, glass, electronics, cosmetics, pharmacy and food etc.