One car solar film is to reduce the temperature of cars in the exposure under the car. Technical difficulties it is as high as possible to block the infrared transmittance, the calories. So, what is the general sun light rate of membrane, in order to ensure the visibility of a driver? You can see the "Introduction" visible light transmission rate of 70% ". Automotive glass film almost all the claims that its transmittance of 70%. Because this is to ensure the front must be safe driving transmittance of glass, and the trap is here. Glass film a light transmission rate of 70%, then affixed to the automobile glass, transparent rate will be far below the national standard GB9656-2003 (China automotive safety glass) 70% transmission required rate of. But the market almost all car solar film, through the transmittance substitution technique, marketing promotion.
In a parking lot, reporter using professional light transmittance of transparent instrumentation, automotive glass detect arbitrary rate. The results found, light a car without film Audi front windshield glass rate reached 78.8%, fully meet the national standard requirements; and the other a film Audi front windshield, but only 37%. There is a world of difference between the rate of light transmittance. The detection of the glass light transmittance of another film Ford front, only 30.1%.
Obviously, there are many car solar film, can not solve the "light transmittance of unqualified insulation, insulation light transmission rate is not qualified" this contradiction. Concerned expert points out, at present about automotive glass membrane and no standard, so the glass film producers to perpetrate a fraud, claiming that the transmittance can reach more than 70% gb. Pervious to light and the national standard for automotive glass rate is, whether it is film.
