Why is there a rainbow effect in the tempered glass screen protector，how to eliminate rainbow effect?

Have you ever seen a rainbow effect in the tempered glass screen protector? Do you know why glass screen protector film have rainbow effect? And how do we eliminate the rainbow effect?

1. What is rainbow effect?

Here the rainbow effect we called is a phenomenon that generally appear arise at the surface of mobile phone screen protector, and it is similar to a rainbow.

2.The harm of rainbow effect

The harm of tempered glass rainbow effect is that it reduces the transmittance of the screen protective film. It also causes the screen protector convey the distortion of the screen color, and affects the our visual experience.

​

3.So why are there rainbow effect, do you all know the reason?

There are two reasons for the rainbow effect appearing after we installed tempered glass screen film:

First, the screen protection film is made of a multi-layer structure, and when the light is irradiated, the refraction produces a rainbow effect. On the other hand, the "rainbow effect" is created because when the substrate needs to be subjected to a high temperature during the hardening treatment. In the high temperature treatment, the molecular structure of the substrate surface is uneven to cause scattering.

The presence of rainbow effect affects light transparency and visual effects. It is difficult to see the rainbow effect with the naked eye after installation the high quality glass screen film. Rainbow effect is actually the product of hardening treatment. The higher the strength of the hardening treatment, the more difficult it is to control the rainbow effect.

In addition, when the PET substrate is subjected to surface hardened hardening treatment, it is also susceptible to coating equipment and curing materials. If the equipment and materials are improperly selected, it is easy to cause uneven surface coating, which leads to rainbow effect.

4.So, the rainbow effect is so much harmful, how do we eliminate the rainbow effect?

• Once the temperature rises to 35 degrees, the rainbow effect on the glass screen protector will disappear automatically.
• The screen protection film is pressed under high temperature environment, when it encounters a sudden low temperature, it will lead to uneven local light transmission, resulting in rainbow effect. When the temperature rises and the overall temperature of the phone screen protector film tends to be the same, the rainbow effect will disappear automatically.
• If it is a rainbow effect caused by the water on the screen, then we don't have to worry too much, it will naturally return to normal in a few days. If it is caused by external forces, then here we suggest to buy a new screen protector.