Polished aluminium mirror sheet is a new type high-tech material that is now used in the market. There are four different types of mirror aluminum which are common in life. The four forms are: polished mirror aluminum, film aluminum mirror, anodized aluminum mirror, and ultra-mirror aluminum. The raw materials of the 4 types are the same, but the appearance and grades are different due to different manufacturing processes. Generally speaking, the grades of these 4 materials are basically from low to high according to the above order.