How to distinguish genuine 3M Crystalline 70?
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Methods to identify genuine 3M Crystalline 70 are as follows: Place the Crystalline 70 in water, and it will exhibit color change. The appearance of red water droplets indicates a genuine product. Crystalline 70 is known as an optical film and is the best windshield film among 3M automotive films, featuring excellent heat insulation without affecting GPS signals. Below is relevant information about 3M Crystalline: 1. Heat Insulation Film: 3M's innovative product, Crystalline Optical Micro-adhered Automotive Heat Insulation Film, utilizes 240 layers as the base material and incorporates nanotechnology to achieve high light transmission, high heat insulation, and effective blocking of infrared and ultraviolet rays. 2. Composition: 3M Crystalline 70 consists of 240 layers of nano-level multi-layer optical micro-adhered film. The optical coating can reflect infrared and ultraviolet rays layer by layer. The most astonishing aspect is that these 240 layers are as thin as a single sheet of A4 paper, capable of effectively blocking 97% of infrared rays and 99.9% of ultraviolet rays, equivalent to an SPF1700 sun protection value, with a maximum heat insulation rate of up to 59%.