How to distinguish between polished aluminum mirror sheet and mirror finish anodized

How to distinguish between polished aluminum mirror sheet and mirror finish anodized



How to distinguish between polished aluminum mirror sheet and  mirror finish anodized aluminum sheet? 
The person that is familiar with aluminum mirror sheet knows, this material has at present domestic, also have abroad, what homebred and imports is to have not little difference. The imported products are usually treated with anodization, while the domestic surface is usually treated with simple polishing instead of this process. The process is different, the performance is different, the price difference is also very big. After the anodization performance is stronger, not easy to be damaged, produced a higher level of products.

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.
These three methods are relatively easy to distinguish between anodized mirror aluminum sheet and polished aluminum mirror sheet. Specific when carrying on a selection, need to identify carefully, careful those illegal peddler with shoddy, affected his later use.