What's the name of a sticker on the glass (you can't see the inside from the outside, but you can see the outside from the inside)?

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

Unidirectional transparent film (also called unidirectional film, mirror film, etc.). ) refers to the film attached to the glass, which makes the glass have a high reflectivity for visible light. One-way perspective film can achieve this effect. When the outside is brighter than the inside, the one-way transparent glass is similar to an ordinary mirror. The outside can't see the inside scene, only the outside scene can be seen. Nowadays, it is generally a one-way perspective movie.

Extended data:

Window film has been quite popular abroad, but in China, the building utilization rate is still very low. As a new energy-saving building material, window film has seven advantages:

1, heat insulation, heat preservation;

2. Safe and explosion-proof;

3, anti-ultraviolet;

4. Anti-glare;

5. Easily create a private space;

6. Enhance the visual effect;

7. High temperature and fire resistance;

Window film plays a very useful role in people's daily life, and it is precisely because of these advantages that it has been loved and praised by more and more people and has been widely used in people's lives.

References:

Window film-Baidu encyclopedia