1. Precious metal film. As the name implies, this kind of film also sprays metal on the colorless original film, but the difference is that all the precious metals such as chromium, titanium, platinum and so on are sprayed. In addition, the sputtering method of this film is "magnetron sputtering". This is a complicated process. This kind of film is characterized by natural color, good light transmission and good heat insulation.

2. Magnetron sputtering film. Multi-layer polyester film technology. This is another technological trend of high-end film. Through multi-layer extrusion technology, 240 layers of polyester film are superimposed to make a heat insulation film with a thickness of only 0.05mm, which has high visible light transmittance and good heat insulation. , Long life, no electromagnetic signal interference and other characteristics.