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.
Applications: It is applied for 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 ***ection in machine building.
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