| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrolytic coloring method for an aluminum member which can gradiently change partially different color tones within the same aluminum member. SOLUTION: A first operation to form an anodically oxidized film 3 having micropores 2 on the surface of the aluminum member 1 by impressing a voltage between the aluminum member 1 immersed into a treating liquid and a counter electrode, a second operation to reform the micropores 2 of the film 3 by immersing the aluminum member having the micropores 2 into the same treating liquid as the treating liquid in the first operation or another treating liquid, and a third operation to color the aluminum member 1 by holding a color forming substance in the micropores 2 of the film 3 of the member 1 are carried out. In the second operation, the contact time of the treating liquid and the aluminum member 1 is changed according to the positions of the areas of the aluminum member 1, by which the degree of reforming the micropores 2 of the film 3 is changed according to the positions of the areas of the aluminum member 1. COPYRIGHT: (C)2004,JPO
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