This powder is a new type of long after-glow luminescent material. Free from any radioactive substance, it can glow in the dark automatically after absorbing varieties of visible light.

This powder's colour is olivine in the daytime. And it can glow sky-blue light in the nighttime. This process of absorbing-emitting can be repeated forever. And the light can keep 8-12 hours.

This powder can be added in many materials. Such as plastic, glass, ink, paint and so on. Also it can be used in printing, resin injection molding or spray powder.