1. From the perspective of clarity, high-quality film should be able to clearly see objects beyond 6m at night, regardless of the color depth of the film, while inferior film will feel foggy.

2. In terms of hand feeling, the genuine film feels thick and slippery, while the inferior film feels thin and crisp, and it is easy to wrinkle.

3. From the color point of view, the second film will tear the lining of the car film, and then scrape it with your nails, and the color will drop.

4. From the point of view of thermal insulation, thermal insulation performance is one of the important indexes of glass protective film, which is difficult to distinguish only by naked eyes and feel. It can be compared by a simple test method: put a piece of glass with a car film on the iodine tungsten lamp, and the high-quality film is the one that can't feel a trace of heat. There are only a few manufacturers of truly internationally renowned brands of thermal insulation films. At present, under the condition that the price-performance ratio of products in the market is uneven, it is particularly important to identify international famous brands and require the quality assurance of international brands. I strongly recommend Johnson and Gu Wei's car movies.

In addition, many businesses now say that their films are imported from abroad. In fact, there are not many automobile film manufacturers with overseas production plants in the domestic market, only Weiguo, Johnson & Johnson, Bekaert Quantum and Dragon Film. Other brands of car membranes are made by small factories, and then marked with various signs, which is generally not guaranteed.