Low-E glass (Low-E glass) is a kind of Low-E glass which is coated with silver and metal oxide film on the surface of glass, which makes the glass present different colors. Its main function is to reduce the U value of glass and selectively reduce SC to improve the energy saving characteristics of glass. The remarkable features are: high infrared reflectance, which can directly reflect far-infrared thermal radiation; low surface emissivity e, small ability to absorb external energy, so that less heat energy is radiated; shading coefficient SC has a wide range, and the transmission of solar energy can be controlled according to the needs to meet the needs of different regions.

Low-E glass with high transmittance has shading coefficient SC ≥ 0.5, which has less attenuation to solar energy. This is very suitable for heating in northern China. In winter, the radiation of solar energy band can enter the room through this Low-E glass. After being absorbed by indoor objects, it becomes far-infrared heat radiation that Low-E glass can't pass through, and is limited to the indoor heating together with the thermal radiation from the indoor heating, so as to save the heating cost.

The shading coefficient SC of Low-E glass is less than 0.5, and it has more attenuation to the solar energy. In summer, solar energy can be limited to a large extent, and far-infrared heat radiation from the outside can be blocked, thus saving the cost of air conditioning.

According to the different number of layers containing silver in the film structure, it can be divided into single silver, double silver and three silver Low-E products. In some cases, a kind of Low-E product with high transmittance and very low shading coefficient is needed. Therefore, double silver emerges as the times require. Generally, with the same shading coefficient, double silver Low-E can have higher visible light transmission. This characteristic of Sanyin is more obvious.