... color solution, which leads to hydrogen or carbon monoxide at high temperature can be reduced to metallic copper. Mainly used for ... , Ferrite magnetic materials and other electronic industries, glass, ceramic, enamel, paint industry, agent for take away, fungicides, solar heat absorber surface ... ---Acid insoluble ≤%0.010.20.2Cl¯ ≤%0.010.20.2 High quality black copper oxide plating grade