Temperature Activated Thermochromic Powder Pigment Black to Yellow Color Changing at 82F/28C by Body Heat

Temperature Activated Color Changing Thermochromic Powder Pigment BLACK changing to YELLOW at 82⁰F/28⁰C, Perfect for Arts & Crafts, School & Home Projects, Science Experiments, Color Changing Slime, Hair Dye, Nail Polish, Color Changing T-Shirts & Shoes, Tumblers, Resin Jewelry, The process is reversible- when it gets cold, the pigment turns to its original color. It can be used again and again, NON-TOXIC pigments safe to use on skin and color changing by body temperature, Product of USA