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