There is a kind of sticker on the glass, the outside can not see the inside, the inside can see the outside, what is it called?

This kind of sticker is called one-way see-through window film.

One-way see-through film (also known as one-way film, mirror film, etc.) is a film attached to glass that makes the glass highly reflective of visible light. One-way see-through film can be realized when the outside is brighter than the inside, one-way transparent glass is similar to ordinary mirrors, the internal scene can not be seen on the outside, but in the inside outdoor scene of the effect of the general application of unidirectional viewing angle of the film now.

Currently one-way see-through film is mainly applied to hidden observation windows, holes and so on. The product can be used in the Public Security Bureau, detention center, prisons, courts, karaoke, offices, kindergartens, psychiatric hospitals and other special places. Compared with the magnetron sputtering heat insulation and thermal insulation film on the market, the price of one-way see-through film is generally around 50-150 yuan/ping.

Extended information

One-way see-through film (also called one-way film, mirror film, etc.), is a kind of film affixed to the glass can make the glass has a high reflection ratio of visible light. One-way see-through film film, can be realized when the outdoor than indoor bright, one-way see-through glass and ordinary mirrors similar to the outdoor can not see the indoor scene, but the indoor can see the effect of the outdoor scene, now one-way see-through film is commonly used in home life glass film.

Objects

1, high-grade housing, villas, buildings, individual houses, glass greenhouses, automobiles, 24-hour self-service banks

2, museums, banks, universities and hospitals, government agencies, art museums, schools, subways and other public **** facilities

3, government offices and intelligence agencies

4, airports, coach stations, railway stations and various convenience stores.

Baidu Encyclopedia: One-way see-through film