UV light, sunlight or ordinary light irradiation object

Objects in ultraviolet light, sunlight or ordinary light irradiation, the object has a luminous performance in a dark environment, saying such an object called photoluminescent sheet . Also called long-lasting light-emitting materials and energy storage luminous materials. Their luminous intensity and duration of delay and materials related to the object. There are a variety of photoluminescent pigment, long to see long phosphorescent phosphor and rare earth long afterglow phosphor. Long phosphor is zinc sulfide phosphors and phosphor copper, phosphor such a low cost, but the unstable nature sulfide, deliquescent, aging resistance poor, time is short when other shortcomings. Rare earths long afterglow phosphor is added to the base aluminate phosphor on divalent europium and dysprosium made of long-lasting phosphors, fluorescence delay of up to twelve hours.