| abstract |
The present invention provides a treatment method for coloring a copper-based metal surface in blue without depending on coating with an organic paint, and a clothing or decorative article made of the copper-based metal produced by this method. SOLUTION: Chlorite is 0.5 to 250 g / L, alkali metal hydroxide is 1 to 625 g / L, and optionally phosphoric acid 0.1 to 50 g / L and glycol 0.01 to 5 g. / L-containing chlorite-based chemical conversion treatment solution for immersing the copper-based metal in the blue-colored surface treatment method of the copper-based metal, and the copper-based metal surface treated with the treatment method having a blue color tone A metal production method, and a clothing or decoration made of a copper-based metal having a blue color tone on the surface produced by the method. [Selection figure] None |