Reflective glass, also known as reflective glass, is coated with one or more layers of metal, alloy or metal compound films on the surface of glass to change the optical properties of glass and meet certain specific requirements. According to different characteristics of products, coated glass can be divided into heat reflecting glass, Low-E glass, conductive film glass, etc. Thermal reflective glass and low emissivity glass are widely used. Vacuum magnetron sputtering and chemical vapor deposition are two production methods.