| 摘要 |
PURPOSE:To form a specular surface like bronze on a product by subjecting the surface of a resin-metal composite sheet to electroplating by using a bath prepd. of the chloride or sulfate of tin and nickel and monohydroxy carboxylic acid and conductive salt, etc. CONSTITUTION:Metallic sheets of Al, etc. are joined to both surfaces of a plastic sheet of polyolefin, etc. to form a composite sheet. On the other hand, a plating bath of the compsn. consisting essentially of the chloride or sulfate of tin and nickel, a monohydroxy carboxylic acid or the salt thereof and conductive salt and having the pH adjusted to a 3.5-5.5 range is prepd. An Sn-Ni alloy is electroplated on the metallic sheet surface of the composite sheet by using such plating bath. The resulted specular surface product has the specular surface which has a bronze-like metallic gloss and is useful in an ornamental application. |
