Safety backed mirror refers to the use of film-sticking equipment to stick a self-adhesive safety film on the back of the mirror and roll it at the same time, so that the safety film is firmly adhered to the back of the mirror. When the mirror is broken, the fragments still adhere to the safety film, and will not fall and splash, thus avoiding other injuries. Generally, there are two types of safety films: smooth PE film and woven mesh film. Commonly known as CAT I and CAT II.