... : 20~30um.Luminous color: Sky-blue.Free of dangerous, toxic, heavy metals, radiation. Friendly to human and environment.Applicable in drawings, oil paint, plastic ... powder, etc.Glow pigment can be used in variety of organic mediums including plastic, rubber, paint, fiber, glass, resin, wax, ink, etc. to make the finished products glow in the dark.The pigment ...