METHOD FOR MANUFACTURING COLORED ALUMINUM PRODUCT OR COLORED ALUMINUM ALLOY PRODUCT, PIGMENT COMPOSITION FOR COLORATION, AND COLORED ALUMINUM PRODUCT OR COLORED ALUMINUM ALLOY PRODUCT

摘要

A method for manufacturing a colored aluminum product or a colored aluminum alloy product includes the following steps of (i) subjecting a substrate made of aluminum or aluminum alloy to an anodic oxidation in a treatment solution containing phosphoric acid to form an anodic oxidation film having a plurality of pores on a surface of the substrate, (ii) treating the substrate with warm water having a temperature between 40 and 100° C., and (iii) immersing the substrate in a pigment composition for coloration includes pigment particles, a dispersing agent and water to fill the pigment particles into a plurality of the pores in the anodic oxidation film on the surface of the substrate, thereby performing coloration.