1. Look at the transparency
This is difficult to recognize with the naked eye. Try to use an optical instrument to measure it. Another simpler method is to cut a small piece of each protective film and place it in the middle of the computer desktop, and then create a new one on the computer. A blank WORD document, check the whiteness of the blank WORD file in the area with and without the film on the computer or the blank WORD file in the different film area (professional point of view is called brightness). By comparing separately, the brighter material can be selected as a better protective film.
Second, look at the haze
1. How do you see the haze of the PE protective film? First, look at the monitor when the monitor is turned off. The method is the same as above. After the various protective films are pasted one by one, the more the screen background color, the smaller the haze, and the more the haze The smaller the material, the better, and the black test board will make it easier to see the difference.
2. Another method is to turn on a fluorescent lamp in a slightly darkened room, tear off the protective film from the upper and lower release films, and hold it with your hand between the eyes and the light. Look carefully to see if there is a layer of fog. Evenly distributed in the protective film, that is the culprit that affects the haze. The more serious the haze, the greater the haze and the worse the material. Otherwise, the better; (note that the haze will affect the permeability , But it is two different concepts from transmittance!
Three, look at static electricity
Since the liquid crystal display is a sensitive device that is afraid of static electricity, the smaller the static electricity is, the better when attaching the protective film. The test method is to prepare the protective film to be tested (three-layer material or two-layer material), smoke a cigarette and knock the soot on the desktop. Or get some small paper scraps on the desktop, and then tear off the protective film on the top of the protective film (this step is for the 3 layers of materials), and then tear off the protective film with the silicone layer. When the protective film is removed Immediately move the used layer (silica gel surface) close to soot or paper scraps to see if the protective film will adsorb these things on the silica gel layer of the protective film and whether the adsorption is strong. The stronger it is, the higher the static electricity generated by this material, the worse the material, and vice versa.
Fourth, look at the scratch
1. Whether the protective film is scratch-resistant and scratch-resistant is a problem that everyone is more concerned about. The scratch-resistant materials on the market are basically the same (2-3H) and have good performance. There are only scratch-resistant and non-scratch-resistant points. The test method is to use a pencil with a hardness of 3H and push it on the pe protective film 10 times with a force of 500G at a 45 degree angle. If there is no scratch, it is considered to reach the 3H hardness requirement.
2. There is also a simple method, which is to use a little hard metal device or newly cut nails to scratch the surface of the pe protective film with the strength of a normal stylus. The simple method is to use a slightly hard metal device or new cut The nails are scratched on the surface of the material with the strength of a normal stylus. If it is very easy to scratch, it is deemed not to be scratch-resistant, and if it is not scratched, it can be determined that it is scratch-resistant.
In recent years, more and more products have larger and larger screen sizes, and more and more smart phones are equipped with capacitive screens (touch with fingers instead of old-fashioned resistive screens, which require a pen to draw) applications, pe protection Films are increasingly required to have anti-fingerprint functions.https://www.pe-protectionfilm.com/