Color-coated Steel coils are based on hot-dip galvanized steel, hot-dip galvalume steel . After surface pretreatment (chemical degreasing and chemical conversion treatment), one or several layers of organic coatings are applied on the surface, and then the product is baked and cured. It is also named because of the color steel coils coated with organic coatings of various colors, referred to as color coated coils.The color-coated steel coil using hot-dip galvanized steel strip as the base material is protected by a zinc layer, and the organic coating on the zinc layer plays a role of covering and protection to prevent the steel strip from rusting. The service life is longer than that of the galvanized strip 1.5 times.Color-coated steel coil have light weight, beautiful appearance and good anti-corrosion performance, and can be directly processed. The colors are generally divided into gray, navy, and brick red. They are mainly used in advertising, construction, home appliance industry, electrical appliance industry, furniture industry and transportation industry.