... particle size range: 20~25um.Luminous color: Orange.Free of dangerous, toxic, heavy metals, radiation ... pigment, photoluminescent powder, photo luminescent pigment, photo luminescent powder, luminous pigment, luminous powder, luminescent pigment, luminescent powder, glowing pigment, glowing powder, night glow pigment ... blue-green, sky-blue, blue-purple, red, orange, etc.)2. Glow in the dark plastic ...