Photoluminescent pigment (glow-in-the dark powder) for printing ink
It absorbs various lights and then glow in the dark or dark place
and can be used repeatedly. When this occurs, they emit energy in
the form of visible light without any chemical reaction. They can
be evenly spread as an additive among the transparent agents such
as coating, ink, paint, plastics, cereal, glass, fiber to activate
the emitting functions of the agents.