I have been in various forums and media for many years, and have read some technical posts related to glass film application. Not many people have truly explained the issue of film application. So I want to stand up and post some truly valuable professional articles that can truly restore the advantages and disadvantages of automotive film itself, so that you can truly understand what properties of your glass is? Do you really need a film? I have relevant work experience in the field of automotive glass and film application, and I have written this article from a theoretical and practical perspective. The main purpose of posting is to share knowledge and help car enthusiasts in need. Feel free to point out any inaccuracies. Those who say that applying film is useless and those who do not apply film abroad should carefully read it before speaking.

First, let's learn about several types of car glass and their properties. Then, based on the properties of the glass on your car, you can choose to seat it according to the specific type, and then decide whether to stick it or not. If you think the film is useful, consume rationally, and don't think that spending more money will definitely have a good effect.

The instrument used for testing in the following figure can read the three performance indicators of glass or solar film, with solar energy accounting for 3% of UV, 44% of visible light, and 53% of infrared light, respectively. The infrared blocking rate does not represent the total insulation rate, and many car film sales often refer to infrared blocking as the insulation rate, which is highly misleading. It can be seen that infrared and visible light account for 97% of the total solar energy, while ultraviolet heat can be ignored. From this, it can be seen that the higher the infrared barrier, the better the insulation performance, the higher the visible light transmittance, and the better the clarity outside the car window, but at the same time, the total insulation rate will also sacrifice a part. Many high-end cars that people buy come with high insulation XIR glass (infrared barrier of 85%) as standard on the side and rear of the car, but they don't quite understand it. As a result, the sales of the film were deceived and a top-notch front bumper film of 7000 or 8000 yuan was applied, but it still felt very hot. Because sales don't understand this insulation principle at all, or they just want to improve sales performance. In fact, this type of glass side rear bumper only requires a conventional insulation film with low transmittance (costing 1000 yuan) to have a total insulation effect higher than that of top-level transparent films. But if you still want high transparency, applying top-level transparent film can also improve some insulation performance, and the effect is naturally not ideal. The front windshield requires more than 70% light transmittance, so it is best to choose a top-level front windshield to enhance thermal insulation for the XIR front windshield glass. Applying a conventional film has almost no effect.

The transmittance tester is set with a wavelength range of 365nm for ultraviolet peak, 530nm for visible peak, and 950nm for infrared peak. Each different tester has a positive and negative percentage error, and the data is for reference only.