Ian film Foshan co., Ltd. is a company specialized in smart glass, construction EVA laminated safety glassfilm development, production and sales of high-tech enterprises.
Those bubbles arise because the thin sticker film expands at a different rate than the window glass when they both heat up.
那些气泡出现的原因在于：热胀冷缩时，车贴薄膜的延展性和车窗玻璃大不相同。
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Each window also gets coated with a thin Mylar film that and is then baked in an oven that stretches the UV-retarding material tightly against the glass, removing any visible imperfections.