Luminous materials at home glow in the dark dye

Luminous materials at home and abroad mainly ZnS, SrS and CaS made,Photoluminescent Ceramic glows green and yellow. SrS, CaS deliquescent material, to a wide range of applications difficult. So the market mainly ZnS luminous material as a substrate. Afterglow time, but it is only 1 to 3 hours, while the light (such as sunlight), ‍ UV light and black perishable moist air, so that in many applications in the field is limited. Adding cobalt, copper activated ZnS luminous although of a long afterglow time, it was quenched with infrared phenomenon,Photoluminescent Aluminum Sheet electric lights (including more red) radiation, the afterglow quickly extinguished.