... , Tin alloy 2, ENVIRONMENTAL 3, ROHS Button, zipper, buckle 666 Lead Free Nickel-free White Bronze Alloy Plating chemicalThe Process features ... grade raw materials, special organic substances and surfactants, absolutely without lead and toxic..2.Plating layer is silvery, more bright than ... common white Cu-Sn alloy which is with lead..3 The lead content in the plating layer can fully pass the ...