| 摘要 |
PURPOSE:To manufacture colored personal ornaments having superior corrosion resistance by forming as undercoat layer an Ni plating layer by electroless plating on the surface of personal ornaments made of copper alloy and then forming on it a colored film of TiN etc. by an ion plating method. CONSTITUTION:The Ni film 2 is formed by electroless plating on the surface of the personal ornament 1 made of copper alloy such as brass, nickel silver, etc., so that the Ni film 2 which, unlike the ones formed by electroplating or other methods, causes no deterioration in plating adhesion and spreadability at narrow interstices, small holes, etc., and is free of partial reduction in thickness as a whole if formed. Then the colored film 3 of TiN etc. is further formed by the ion plating method on it. The Ni layer 2 as undercoat plating is free of partial reduction in thickness, so that the personal ornaments excelling in corrosion resistance and having the colored layer of TiN can be inexpensively manufactured. |
