How to Distinguish the Authenticity of 3M Car Film?

[LeJasmine]

Methods to identify the authenticity of 3M car film include: observing the appearance of the heat-insulating film, smelling the film up close, and paying close attention to the film application effect. The specific details are as follows: 1. Observe the appearance of the heat-insulating film: Inferior films usually have a darker color to block a large amount of visible light. After exposure to sunlight, the color of the film will fade, mainly because the adhesive layer of the film volatilizes after exposure, causing color changes. More alarmingly, inferior films use ordinary, cheap materials and curing processes, which can partially melt under sunlight, causing optical distortion and posing significant driving hazards. 2. Smell the film up close: You can ask the store for scraps of the heat-insulating film and smell them up close. If you detect a strong, pungent odor, it can basically be judged as an inferior film, mainly due to the use of harmful chemical adhesive layers during the film manufacturing process.