releasing the Photoluminescent Sand

At the same time,some of the electrons in the excited fall into the trap center is bound to complete the energy reserves. At the same time , some of the electrons in the excited fall into glow in the dark tape center is bound to complete the energy reserves. After the light is removed, by the ambient temperature perturbation energy electrons out of the trap fell to the ground state , releasing the shackles in the center of the trap formed excitation-emission light. Since the electrons are bound by the glow in the dark pebbles ambient temperature disturbance gradually out of the trap , the light-emitting performance of a long process , thereby forming a long afterglow . Luminous watches in the production , should choose.