Is the luminous sticker harmful?

This is bad and harmful to people's health. Because luminous materials have certain radioactivity, long-term contact will have an impact on the body! It's best not to use anything with luminous materials!

Children had better not buy it (don't put it in your mouth, because you don't know what its ingredients are, most of them are toxic). It is best not to buy liquid.

Phosphors (commonly known as noctilucent powder) are usually divided into two categories: photoinduced energy storage noctilucent powder and radioactive noctilucent powder. Luminous powder for storing light energy is a kind of phosphor that stores light energy after being irradiated by natural light, sunlight and ultraviolet rays. Then it is slowly released in the form of fluorescence after the light is stopped, so it can still shine at night or in the dark, lasting for several hours to more than ten hours.

In real life, people use the long-term luminous characteristics of noctilucent powder to make weak lighting sources, which have special uses in military departments. This material can be coated on aviation instruments, clocks, windows, various switch signs on machines, door handles, etc. , can also be pressed into various symbols, components, items (such as power switches, sockets, hooks, etc. ) and various transparent plastics.

At present, the main luminescent materials at home and abroad are ZnS, SrS and CaS, which emit green and yellow light. SrS and CaS materials are easy to deliquesce, which brings difficulties to their wide application. Therefore, the market is dominated by ZnS luminescent materials.