1. The higher the infrared barrier rate of the film, the better. This statement is definitely a mistake. Because only 53% of the sun's radiant heat comes from infrared, another 3% from ultraviolet and 44% from visible light. Therefore, even if a film can block 100% of infrared radiant heat, 47% of solar radiant heat still needs to be dealt with.
2. Heat insulation rate: this indicator can be directly felt by car owners. There are many kinds of films on the market with a heat insulation rate of more than 80%. In fact, the heat insulation rate of automobile films is generally between 40% and 70%. This data is true and reliable. And only some high-grade films containing ultra-thin metal coatings can achieve these indicators. When the sun shines on the car film, the solar energy will be divided into three parts: penetration, absorption and reflection. The sum of the three is equal to 100%. The absorbed part of solar energy will be converted into heat and radiated outward. The heat insulation rate is the sum of the energy reflected and absorbed by the automobile membrane and then radiated out.
3. The darker the film, the better. In order to obtain better heat insulation effect and good privacy, people often choose dark car protective film when choosing solar film. In fact, the general "black paper film" and "tea paper" are not insulated at all. The thermal insulation effect of the film is determined by the thermal insulation layer in the film. Therefore, it is not that the darker the color of the automobile film, the better. The quality of the automobile film cannot be measured by the color of the automobile film.
When choosing a suitable car film for your car, you should pay attention to what should not be careless. What should be paid attention to is only about the selection of car film. In fact, the installation of car film is also very important, and the installation technology is an important standard to determine the effect of car film.