Insulating glass can be divided into two categories according to different requirements. One is that the glass can absorb a large amount of infrared rays, and it is basically colorless, that is to say, the glass should be in the visible region of 400 m forest to 76. Yelin has a high smooth transmission curve. For example, glass used in film baking, film projection, slide projection, color printing, etc. requires not only to separate the heat generated by the light source, but also to protect the film, without affecting the restoration of color. In terms of composition, this kind of glass generally belongs to phosphate glass system. The other kind is that it requires absorption of some infrared rays, and the glass is allowed to take part of the color. For example, windows of buildings in hot areas, shadowless lights for surgery and windshields of cars. This kind of glass generally belongs to silicate glass system.
They do not absorb visible light, but near infrared light, which produces a lot of heat. XRB1 and XRB3 have the most obvious performance characteristics when they need high light intensity and need to isolate heat. The application of coated hot glass in buildings can directly reduce the temperature, and the temperature difference is about 3 - 6 C.