| 主权项 |
1. A method of preparing a metal composite on a metal substrate, comprising:
forming an anodic oxidation layer on a surface of the metal substrate to contain a plurality of micropores within the anodic oxidation layer; forming a dye layer comprising a dye and a water soluble ink on the anodic oxidation layer, wherein:
the dye layer has a gradual thickness that is represented by a two dimensional continuous function, and the water soluble ink has a low fluidity to resist a flow leveling effect and maintains the gradual thickness of the dye layer, such that the maintained gradual thickness is kept stable, and different thicknesses and shapes of the dye layer at different portions of the anodic oxidation layer for forming a corresponding gradient color pattern are unchanged during an entire subsequent resting process; resting the metal substrate such that an amount of the dye goes downwardly from the stable dye layer on the anodic oxidation layer, to be separated with the water soluble ink, and to be absorbed into the micropores within the anodic oxidation layer, wherein the amount of the dye changes with the unchanged gradual thickness of the dye layer to form the corresponding gradient color pattern on the metal composite; and removing the water soluble ink that is remained on the anodic oxidation layer. |
