Solar Color Dust is a photochromatic (UV sensitive) pigment powder that changes color when exposed to sunlight or UV Black light. Great for use in many clear bases including resin, epoxy, paint base, lacquer, glue, gel, varnish, and clear coat. Mix 1 gram for 1-2 fluid ounces of base. If kept out in sunlight for long periods of time color will eventually stop changing color. 10 gram bag, Changes from Orange to Blue.