Glowminex Purple Invisible Day Glow Pigment is formulated to bring you maximum brightness! * It is non-toxic and non-radioactive and can be repeated indefinitely. * The pigment is invisible during the day and will glow neon purple at night. * This pigment is perfect for making glow in the dark paints, glow wall murals and pictures, glow candles, and so much more. * Each pack contains 1 ounce of purple glow pigment. For safety, do not use on your skin/hair.