Coated glass (Coated glass) is also known as reflective glass. Coated glass is coated with one or more layers of metal, alloy or metal compound film on the surface of the glass to change the optical properties of the glass to meet a specific requirement. Coated glass can be divided into the following categories according to the different characteristics of the product: heat-reflective glass, low-emissivity glass (Low-E), conductive film glass, etc. Heat-reflective glass is generally coated with one or more layers of metals such as chromium, titanium or stainless steel or their compounds on the glass surface, so that the product is rich in color, with appropriate transmittance for visible light, high reflectivity for infrared light and high absorption for ultraviolet light, therefore, also known as sunlight control glass, mainly used in buildings and glass curtain walls; low-radiation glass is coated on the glass surface by multiple layers of silver, copper or tin and other metals or their compounds, Copper or tin and other metals or their compounds composed of thin film system, the product has a high transmittance of visible light, a high reflectivity of infrared light, with good thermal insulation properties, mainly used in buildings and cars, ships and other vehicles, due to the film layer strength is poor, generally made of hollow glass use; conductive film glass is coated with indium tin oxide and other conductive films on the glass surface, can be used for glass heating, defrosting, defogging as well as used as LCD screens, etc.