... environmental pollution. MaterialsInorganic compounds: borax, calcium carbonate, hydroxide, copper sulfate oxide, barium carbonate, antimony trioxide, all kinds of metallic hydroxide, all ... : kaoline, silicone trioxide, clay and so on.Dyestuff: anthraquinone, black ferric oxide, indigo blue pigment, butyric acid, titanium hydroxide, zinc sulfide, all ...