Blue daytime glow in the dark powder that glows blue color in the dark and under a black light.* Luminosity: Blue* Daytime Color: Light-Blue* Ultraviolet Color: Light-Blue* Glow Time: 6 + Hours* Micron Size: * Encapsulation: Not-Encapsulated* Temperature Resistance: up to 600°C/1100°F* Composition: SrAI2O4:Eu,DyCompatible Mediums:Use with resin, epoxy, acrylic or solvent paint, glass, nail polish, clay, rubber, cement, silicone, glaze or glue.Lifetime Investment:Glow in the dark powder can be charged, and discharged indefinitely, making them very economical to use. Glow in the dark powder, also called glow in the dark pigment are the basic ingredient for most glow in the dark products used by consumers, businesses, education and government agencies, artists, scientists and safety applications for buildings.Environment & Safety Information:Environment friendly, not toxic, hazardous, flamable or radioactive. Contains no soluble heavy metals. No electricity, wiring, or battery power required. 100% Reliable and green. Not food save.