Color Changing Deals offers NON-TOXIC Photochromic Powder Pigments which changes color activated by exposure to UV light- Sunlight. The pigment is one color but when you move it outdoor and expose to Sunlight, it changes color depending on how strong the sun is and how much Ultra Violet light it absorbs. The process is reversible- when you go back indoor or block UV light, the pigment turns back to its original color. It could be mixed with materials such as glue, paint, varnish,epoxy resin, mediums, gel, hair mousse, liquid plastics/polymers, nail polish, silicone and many more. The pigment doesn't mix with water. Our products can be used for Color Changing Slime, Goo, Tumblers, Nail Polish, Home & School projects, Science Experiments, Arts & Crafts or wherever your imagination takes you. Available colors: White-Violet Pink-Blue White-Blue If you have any questions, don't hesitate to ask. Ships the same business day. Domestic shipping is always FREE.