METHOD FOR COLOR DEVELOPMENT OF METALLIC TITANIUM, AND BLACK TITANIUM AND COLORED TITANIUM PREPARED BY SAID METHOD

摘要

A method for color development of metallic titanium which is used in the preparation of black titanium or chromatically colored titanium. When metallic titanium is treated with an alkali solution, colored titanium rich in color variation can be efficiently prepared independently of the shape of the material. After this treatment, nitriding enables a further lowering in the brightness of black. When metallic titanium is nitrided to form a titanium nitride film on the surface thereof and then oxidized to form a black titanium having a low brightness, colored titanium having various color tones can be prepared. Further, the tight adhesion of the colored film can be enhanced.