... crystal powder.Average particle size range: 20~25um.Luminous color: Orange.Free of dangerous, toxic, heavy metals, radiation. Friendly to human ... powder, etc.Glow pigment can be used in variety of organic mediums including plastic, rubber, paint, fiber, glass, resin, wax, ink ... in yellow-green, blue-green, sky-blue, blue-purple, red, orange, etc.)2. Glow in the dark plastic products: printing photo ...