Color steel sheet manufacturers introduce traditional coatings into several categories, the most high-grade is in fluorocarbon coating, almost anti-corrosion to 20 years. It is generally distributed from steel mills to various locations in the form of reels. The hot sale color-coated corrugated roofing sheet we often see refers to the finished sheet, which has a thickness of about 50 to 100 mm. It is composed of an intermediate filler and a double-sided color steel sheet. Among them, the thickness of the color sheet has different thicknesses such as 0.4mm, 0.5mm, 0.6mm, etc., and the intermediate layer may be made of polyurethane, rock wool or foam plastic. Due to the special profiles, the construction of the building with color steel plates is fast, but the strength is low. The substrate of the color coated steel sheet is a cold rolled substrate, a hot-dip galvanized substrate and an electrogalvanized substrate. The coating types can be classified into polyester, silicon modified polyester, polyvinylidene fluoride, and plastisol.