Patent ID: 11866838
Assignee: NATIONAL CHENG KUNG UNIVERSITY
Field: Surface technology, coating (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A method for creating colorful patterns on a metal surface comprising the steps of:
Step one: carrying out a first anodizing process on a metal substrate to form a first anodic oxide layer on a surface of the metal substrate;
Step two: subsequent to the first anodizing process, coating, by a printing machine, a layer of a colorless ink devoid of color defining agents on the first anodic oxide layer on the surface of the metal substrate to form a colorless ink pattern mask, wherein the first anodic oxide layer is sandwiched between the metal substrate and the colorless ink pattern mask;
Step three: performing a second anodizing process to form a second anodic oxide layer on a part of the first anodic oxide layer on the metal substrate not covered with the colorless ink pattern mask;
Step four: removing the colorless ink pattern mask; and
Step five: coating a metal film on a surface of the first anodic oxide layer and a surface of the second anodic oxide layer.