Low-E glass, also called Low-E glass, is a coating of multilayer metal or other compounds on the surface of glass. The coating has the characteristics of high visible light, high transmittance and high reflection to the mid infrared ray, and has excellent heat insulation effect and good light transmittance compared with the common glass and the traditional architectural coating glass.

Glass is an important building material. With the increasing demand for decorative buildings, the use of glass in the construction industry is also increasing. However, nowadays, people choose glass doors and windows of buildings, in addition to considering their aesthetic and appearance features, they pay more attention to the problems of heat control, refrigeration cost and internal sunshine projection, comfort and balance. This makes the "Low-E" glass, the upstart in the coated glass family, stand out as the focus of attention.