The history of self-luminous

Photoluminescent Tumbled Gravel Traditional fluorescent coating materials can be classified into spontaneous and store two light. Spontaneous fluorescence light agent is by its own radioactive release agent ray fluorescence excitation light trace mostly. Fluorescent light storage agent is basically not containing radioactive material, but need to reserve enough to absorb the external light intensity, oneself from a low level of electron transition to the high level of energy and stored. When darkness surrounding environment, the energy absorption and then gradually slow release, as from high level to low level transition electron, fluorescent agent began to glow. Because light rays stimulate storage material itself does not carry, so the durability of afterglow temporarily not illuminated. Early is more common in Phosphorescent Ceramic, using its radioactive received gradually restrict the use of fluorescent coating of the radioactive radium salt activator, and now has begun to be being washed out gradually.