When selecting a product, pay attention to the following key performance indicators:
* Visible light transmittance: According to national standards, the visible light transmittance for the front windshield and the driver's view area should be ≥70%, while for side windows and the rear windshield, it should be ≥50%.
* Thermal insulation and UV blocking rate: The UV blocking rate of high-quality films should exceed 99%, and the infrared blocking rate is recommended to be between 85% and 98%.
* Material and manufacturing process: Prioritize nano-ceramic or magnetron sputtering processes; avoid colored films that are prone to fading or heat insulation, or conventional metal films that are susceptible to oxidation or signal interference.
* Authoritative certifications: Refer to quality verification reports issued by institutions such as the China Automotive Technology and Research Center (CATARC) and the China National Inspection Group (CNIG).
