What are the precautions for applying car window film?

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Things to note: Measure the window dimensions and cut the film accordingly. Clean the window glass before applying the film. When smoothing, work from the center outward. During heat shaping, generally start baking from areas with larger curvature downward. Below is relevant information about window film application: 1. Functions of window film: Its main purposes include blocking ultraviolet rays, reducing heat transmission, preventing injuries caused by shattered glass, reducing glare, and protecting personal privacy through the one-way visibility feature of solar films. Additionally, it can minimize damage to interior items and occupants from UV exposure, lower the car's interior temperature through physical reflection, reduce the use of air conditioning, thereby decreasing fuel consumption and saving costs. 2. Principle: The film is made by depositing multiple layers of highly insulating metal films (such as aluminum, gold, copper, silver) through vacuum deposition or magnetron sputtering technology. The outer shell electrons (free electrons) in metal materials are generally not bound by the nucleus. When exposed to light waves, the electric field of the light causes free electrons to absorb the light's energy, producing oscillations at the same frequency as the light. These oscillations then emit light at the original frequency, known as light reflection.