... particle size range: 20~30um.Luminous color: Blue-purple.Free of dangerous, toxic, heavy ... pigment, photoluminescent powder, photo luminescent pigment, photo luminescent powder, luminous pigment, luminous powder, luminescent pigment, luminescent powder, glowing pigment, glowing powder, night glow pigment ... dark pigments (glow in yellow-green, blue-green, sky-blue, blue-purple, red, orange, etc.)2. ...