The rainbow pattern on the toughened film is the crushing injury of AB glue in the production process, which will be relieved after a period of time, but will not be completely eliminated. If it is attached to the mobile phone and the quality of AB glue is good, it can be completely absorbed into invisibility in about 48 hours.

The solution is to debug the laminator in the production process and train the laminator to prevent this from happening in production. If it has been made into a finished product or has reached the hands of consumers, we can only let the time pass by the above methods. There is really no way to get rid of it, just change it to a good quality film.