... method, good physical properties, low technical impurity, even fineness; white powder or paste, non-toxic ,insoluble in water, soluble in fuming ... method, good physical properties, low technical impurity, even fineness; white powder or paste, non-toxic ,insoluble in water, soluble in fuming ... .Packing:20 ~ 50 kilograms paper bags or compound bag, half ton bag or ton bag packing, also may act according ...