Glow in dark

Glow In The Dark pigment powder, also known as luminous powder, phosphoric pigment, are usually divided into two categories: photostored luminous powder and luminous powder with radioactivity.
Photoluminescent powder is a phosphor in natural light, daylight light, ultraviolet light and other irradiation, the light energy is stored, after stopping light irradiation, and then slowly released in a fluorescent way, so at night or in the dark, you can still see the glow, lasting for a few hours to more than ten hours.

In contrast to thermal radiation, fluorescence is a process that produces light with very little heat.
The appropriate material absorbs high-energy radiation and then emits light with a lower energy than the energy that excites the radiation.
When the luminescent material is a solid, the material is usually called a phosphor.
The high-energy radiation that excites the phosphor can be electrons or ions with high velocities, or it can be photons in the range from gamma rays to visible light.

Light storage luminescent pigment (commonly known as: luminous powder, long persistence phosphor，phosphoric pigment，glow in the dark pigment) is a powder photostorage luminescent material, through the absorption of various visible light to achieve luminous function, especially for 450 nm below the short-wave visible light has a strong absorption capacity, and can be recycled many times.
The product can be used as an additive, uniformly distributed in a variety of transparent media such as: paint, ink, paint, plastic, printing paste, ceramics, glass, fiber, etc., to achieve the luminous function of the medium.
The pigment presents its own appearance color in the light, and emits different colors of light in the dark, showing good low-degree emergency lighting, indicating signs and decorative beautification functions.
Various luminous products made of the pigment are widely used in daily necessities, architectural decoration, transportation, military facilities, fire safety and other fields.