Haomei has blue, white and red colored anodized aluminum sheets for sale. The colors are obtained by a specialized color coating process. There are three methods for this. 1) Adsorption coloring, that is, dyeing with organic or inorganic dyes. 2) Electrolytic coloring, that is, electrolysis is performed after anodizing and before sealing, so that the film produces different colors. 3) …