How to distinguish between polished aluminum mirror sheet and mirror finish anodized aluminum sheet? Many methods, such as tear protective film on the surface of the can, and then touch the mirror, see the perspiration will stay above, and then clean the paper, look at that, if left no trace, is after anodic oxidation treatment, and if not only left hand finger print, and the clean the dirty of that kind of is the mirror polishing. Another approach is to bend the aluminum around the ear and listen for specific sounds that, if slightly broken, are anodized, whereas polished ones do not. Another method is to bend the product at 90 degrees T. The product with good quality will have slight bleaching. When the anodized film is burst, it will have bleaching, while the product with poor quality will not have such condition.

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