Sunny film is needed in order to prevent the premises of excess heat in the summer, and in order to reduce all heat losses in winter. The film that has camouflage properties is needed in order to create glasses with some special properties. Nothing is visible through such glass from the outside, but at the same time everything is perfectly visible from the inside. If we talk about the protective film, then it prevents the fragments to spread. So, in the case of a strong blow, all the fragments will only remain on the film.
