... pigment, luminescent powder, long after glow with high luminous. Suitable for signs, arts, etc. Luminescent pigment, ... crystal powder.Average particle size range: 45~65um.Luminous color: Yellow-green.Free of dangerous, toxic, ... photoluminescent powder, photo luminescent pigment, photo luminescent powder, luminous pigment, luminous powder, luminescent pigment, luminescent powder, glowing pigment, ...