It's perhaps anti-sunlight film.
Usually, it's PE film of low adhesion or static film.
Glass protective film is a kind of special film on the market. It's customized by specialized gummed paper manufacturers. Now it's widely sold on market. Those who sell glass consumables also sell this kind of film. According to the thicknesshis, this kind of film can be classified into two types--0.14 mm type and 0.16mm type. Which type to choose depends on what kind of processing you are going to do. If you just want to do horizontal spray, thin film (0.14mm) is ok. If you want to do carving, you should choose the thick type (0.16mm) so that it won't break.
