The first thing is to look at the clarity. For glass film, its clarity should be very high, and the clarity will not affect its actual visual effect due to the color of the film. So when you buy, It can be recognized by observing its clarity. Inferior film, it looks fuzzy and foggy. The second is smelling, the glass protective film is not environmentally friendly. This will not only not guarantee the effect, but also release a large amount of formaldehyde, and the identification is actually relatively simple. A good film does not have a lot of peculiar smell, but inferior.
The membrane will emit a pungent smell. The other thing is to look at the appearance effect. This kind of protective film must not only have a variety of protection, it also needs to guarantee a certain appearance effect, so you can tear up the film and then paste it again to see if there are bubbles in the actual appearance effect. It can be distinguished whether it is good or bad. A good film will be intact when pasted again, while a poor quality film will have bubbles.