Zinc electroplating additives 1)ZnSO4.7H2O%,98%;Zn,22% 2)Package,50kg/bag ... . used for electroplating, mordants, wood and leather save agents ,bone glue clarify save agents,electronic components,emetics,medical microbicides, prevent fruit tree ... sieve) ≥--95-Feed grade standard: 2934-2000 zinc sulphate electroplating additives