Speaking of coated steel plate, it is a kind of steel plate with decorative color film. Nowadays, coated steel plate is widely used, such as: hospitals, stations, modern factories, logistics warehouses, large-scale complexes and other large-scale industrial building roof construction and plant renovation Engineering etc. In home appliances, such as refrigerators, washing machines, water heaters, rice cookers, and many other shells, such coated steel plates are also used. This kind of steel plate is composed of a combination of substrate + color film, different use scenarios need to choose different substrates.