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