iron oxide black

 antirust paints, primers, watercolors and
greasepaints for cultural and educational industries, for coloring for man-made marbles, cement floors and ground tiles as well as cathode plates of alkaline batteries, and for steel production of electronics and telecommunication industries, and steel fault detection in machine building.

Black powder, addition
compound of ferrous oxide and ferric oxide, with magnetism, high tinctorial strength and covering power, good resistance to light and atmosphere, good light-fastness, and no impermeability or oil residue. It is very stable in general organic solvents, not resistant to acid, soluble in hot strong acid. Good alkali resistance

paint ,printing ink ,building materaial ,
and electric telecommucation industry