... , even UV light source for minutes.Material: Strontium Aluminate based.Appearance: Yellowish crystal powder.Average particle size range: 25~ ... 35um.Luminous color: Yellow-green / blue-green.Water-resistant, water proof treated.Free of dangerous, toxic, heavy metals, radiation. ... be used in variety of organic mediums including plastic, rubber, paint, fiber, glass, resin, wax, ink, etc. to make ...