(1) surface preparation treatment: the aluminum profile frame is cleaned on the surface of the profile in the way of organic chemistry or physics, exposing the pure matrix, in order to get detailed and high density human oxide film. It can also obtain mirror glass or no light (matte) surface according to mechanical equipment.

(2) Anodic oxidation: after surface preparation treatment of the profile, under a certain technical standard, the substrate surface produces anodic oxidation, transformed into a layer of high density, porous structure, strong adsorption AL203 film layer.

(3) Hole sealing: the porosity of the porous structure of the oxide film formed after anodic oxidation is closed, so as to improve the pollution treatment, corrosion resistance and wear resistance of the oxide film. The oxide film is colorless and transparent, using the strong adsorption force of the oxide film before sealing the hole, in the film hole absorption of some metal salt accumulation, aluminum shelf can make the surface of the profile present a lot of colors outside the primary color (silver), such as: gray black, copper, orange yellow and stainless steel plate color.

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