Polished mirror aluminum sheet is widely applied as decorative material in various areas like building exterior wallboard, roofing ceilings, interior ceilings, advertising boards and sign boards.

Generally speaking, it has the following advantages as decorative material. First, it’s suitable to be coated with any color needed. Polished mirror aluminum sheet shows so strong adsorption capacity that painting materials, once well painted, last decades without falling off. Second, it has exceptional anti-corrosion performance. Aluminum element on the surface of common aluminum coil has chemical reaction with oxygen in the air easily, in which process a protective film is produced on the surface. This film cannot be destroyed most of the time under even severe conditions. To meet varied production demands, common aluminum coil is usually further processed to improve its corrosion resistance. Polished mirror aluminum sheet, for example, is usually coated with PE or PVDF, both with strong anti-corrosion performance. Third, aluminum coil trim is easy to form, stamp, weld and process. People can make it into necessary shapes based on different needs.

Among various applications of aluminum coil trim, exterior wallboard occupies a large share. That is the very reason relative manufacturers has sprung up like growing bamboos after a timely rain. Under such circumstance, purchasers can not avoid to make a comparison before making a decision. Then how to judge the quality of wallboard aluminum coil trim in the simplest way? Here are three tips. First, observe the appearance. The surface of quality wallboard should be exempt from dark gloss, cracks, corrosive marks, air holes, pressing marks, oil, unnecessary lines, sunken hollows or foreign matters. The intersecting surface should have no color problems like black, gray or green. Second, feel the wallboard. Good aluminum coil trim is smooth, dense and even. Third, check the flexibility. After being pressed slightly, the board should recover its original state without deformation. Neither should it show cracking lines while bent in the right-angle.