What is glow in the dark powder made of?

Glow in the dark powder is a kind of luminescent material with special crystal structure, it has the ability of absorbing light energy – storing light energy – emitting light energy, when subjected to natural light and light irradiation, that is, absorbing and storing part of the light energy, and then in the form of visible light in the form of a slow release in the dark. What is glow in the dark powder made of? Common light-emitting substances are zinc sulfide or strontium aluminate, which mainly absorb visible and ultraviolet light. When these substances absorb light energy, their electrons are excited to a high energy state and then gradually return to the ground state when they release energy and emit light.

In general, zinc sulfide usually has a shorter glow time than strontium aluminate, but its luminous intensity may be higher. Strontium aluminate is often used in products that emit light continuously for long periods of time, such as glow-in-the-dark dials or safety signs, where the light emitted can last for hours or longer. In contrast, zinc sulfide may have a slightly shorter luminescence time, but its luminescence intensity is higher, especially in short periods of time, and its luminescence effect may be more pronounced.

The luminescent material can automatically emit light for more than 8 hours in the dark after being exposed to light for 10 minutes. Typically, these glow in the dark powders will show a strong luminescence effect when they are first charged, and then the luminescence intensity will gradually diminish over time until it disappears completely. The process of light absorption and luminescence can be repeated countless times, and the luminescence life is more than 10 years.