Patent ID: 9353454
Filing Date: 2016-05-31
CPC Classification: C25D

Claim Text:
1. A method for anodizing and dyeing a metallic article, the metallic article comprises a decorated surface to be dyed, the method comprising steps as follows: anodizing the metallic article to form an anodization layer on the decorated surface thereof by an anodizing treatment, wherein the anodization layer is porous having a plurality of holes therein; sealing the anodization layer of the metallic article after the anodizing step by a first sealing treatment in a first sealing solution, wherein a contacting time of the anodization layer and the first sealing solution changes gradually along a predetermined direction, and a depth of the plurality of holes of the anodization layer after the sealing step thereby changes gradually along the predetermined direction; and coloring the metallic article sealed in a dyeing treatment.