Temperature Activated Thermochromic Powder Pigment Black Changing to COLORLESS (Translucent White) at 82F/28C Perfect for Color Changing Masks Secret Message Reveals
- Temperature Activated Color Changing Thermochromic Powder Pigment BLACK changing to COLORLESS at 82⁰F/28⁰C.
- Perfect for Color Changing Slime Secret Message Reveals Arts Crafts School Home Projects Science Experiments.
- The process is reversible- when it gets cold, the pigment turns to its original color. It can be used again and again.