What is the required light transmittance for car window film?

[Harmony]

Typically, the visible light transmittance should be greater than or equal to 70%, so a car window film with a light transmittance of 70% or higher is considered qualified. Here is some relevant information: 1. Car window film has been widely accepted by car owners and has basically become a standard feature. Car window film can provide heat insulation, UV protection, and also has safety and anti-explosion functions. Some car owners use window film to protect their privacy. However, window film can also pose safety hazards, with the most significant being its light transmittance performance, which can affect visual clarity and lead to safety issues. 2. In December 2013, the Ministry of Public Security issued the GA/T744-2013 industry standard "Sunshade Film for Automotive Window Glass," which sets safety regulations for the performance of sunshade films. It specifically stipulates that for the front windshield and other windows used by the driver to observe rearview mirrors, Class I sunshade film must be applied, and the visible light transmittance should be greater than or equal to 70%.