1, see the light transmittance.
Light transmittance is an important reference when we choose anti-blue film. Generally speaking, the light transmittance of anti-blue film should reach at least 99.9%, because it can effectively filter out blue light and ensure the clarity of mobile phone screen. So pay attention to the blue light protection rate of this product before buying. If you can't meet this standard, you must choose carefully.
2, look at the screen color distortion
Some bad anti-porn movies, you will find that the color of the whole screen is distorted and off-color, so we need to manually or use other tools to correct the color and brightness of the screen! Regular brand anti-blue film will not have any influence on color difference, and it does not need to be adjusted and corrected.
Step 3 look at the materials
For the PET material of ordinary film, the anti-blue light technology added on this basis may be relatively unsatisfactory! Nowadays, many regular brands of anti-yellow films choose to use tempered glass film, because it is more convenient to add anti-blue coating on tempered glass film, thus achieving the effect of eye protection! The toughened blue light-proof film can be bent over 90 degrees without deformation.
Step 4 look at the thickness
At first, the thickness of some ordinary tempered films will reach 0.4mm, which may affect the sensitivity of touch when used! At present, many anti-blue light tempered films can achieve an ultra-thin thickness of about 0.1-0.3 mm. Relatively speaking, while playing a protective role, the thinner the use experience, the better.
5. See if there is any third-party monitoring report.
The anti-blue-light mobile phone film directly related to eye health, if it is to be produced, must pass the certification of national authoritative testing institutions and meet strict production standards before it can be produced and sold! When buying, see if it has the blue light effect monitoring done by a third-party authority.
Extended data
Blue light danger
1, blue light can directly reach the retina, causing myopia;
2. Blue light can stimulate brown pigment, which is an important cause of skin freckles;
3. Blue light can cause blurred vision, fatigue and VDT syndrome;
4, can cause glare;
5. Blue light can promote the secretion of melatonin, disturb sleep and increase the incidence of major diseases;
6. Blue light can cause fundus damage after cataract surgery.