PURPOSE: To obtain a spectacles frame having a bright purple-colored film on an arbitrary part with sufficient joining strength by forming an Au-Ag film with a specific composition on an arbitrary part of the above frame by a sputtering method by using independent Au and Ag targets and then subjecting the above frame to heat treatment.

CONSTITUTION: An arbitrary part of a spectacles frame made of metal, such as the upside of the front, is masked with Al foil, etc., and a film of Au-Ag (15W30wt.%) is formed by a sputtering method by using independent Au and Ag targets. Subsequently, the above Al foil is removed, and the spectacles frame is subjected to heat treatment at about 300°C for about 30min in an inert atmosphere of nitrogen gas, etc. By this method, the spectacles frame which has the Au-Ag alloy film free from descoloration due to oxidation, etc., having sufficient joining strength, and showing bright purple color on an arbitrary part can be obtained.