Surface processing method for decorative articles, a decorative article, and a timepiece

A surface processing method for a decorative article, comprising:

• forming a primary coat of at least one layer on at least part of a base material surface;
• and
• forming on the at least one primary coat layer, using a dry plating method, a film composed of an Au—Pd—Fe—In alloy containing about 0.1 to about 10 wt % Pd, about 0.1 to about 8 wt % Fe, and about 0.1 to about 10.0 wt % In.

A decorative article manufactured using a surface processing method comprising:

• forming a film composed of an Au—Pd—Fe—In alloy on at least part of a base material surface using a dry plating method;
• wherein the alloy contains about 0.1 to about 10 wt % Pd, about 0.1 to about 8 wt % Fe, and about 0.1 to about 10.0 wt % In.

A decorative article, comprising:

• a base material;
• and
• a film covering at least part of the base material, the film being composed of an Au—Pd—Fe—In alloy containing about 0.1 to about 10 wt % Pd, about 0.1 to about 8 wt % Fe, and about 0.1 to about 10.0 wt % In.