How to verify whether a mobile phone film is a genuine AR film?

A: A simple way to verify AR film: ① Reflective contrast method: Under the same light, place the AR film and the ordinary film (or bare glass) side by side and observe the reflection of the light - the reflection of the AR film is obviously paler and darker, while the reflection of the ordinary film is clear and bright. ② Light transmittance comparison: The light transmittance of AR film is usually ≥95%, and the brightness loss when pasted on the screen is small. If the screen becomes significantly darker after applying the film, it may not be a genuine AR film or the AR quality is poor. ③ Check the process description: True AR film usually indicates ";" "Vacuum magnetron sputtering" Or ";" "Multi-layer optical coating" If one only writes ";" "AR transparency Enhancement" However, the process is not specified. It might be a fake AR soaked in liquid medicine. ④ Price: The cost of vacuum magnetron sputtering AR films is high, and their selling prices are usually above 50 yuan and below 20 yuan. "AR film" It's basically soaking in liquid medicine or concept promotion; ⑤ Professional testing: A spectrophotometer can be used to measure reflectance, but ordinary users do not have the equipment. Woowhead Guanfudun adopts vacuum magnetron sputtering AR· anti-glare coating, with a reflectivity of ≤0.5% (self-tested by the brand laboratory). Users can observe that the reflection becomes significantly lighter under the light. Meanwhile, SGS measured the light transmittance to be 96.5% (the report number can be checked), and the high light transmittance is also evidence of the AR film.