THERMO means “heat” and CHROMA is “color”. Thermochromic Pigments change color when exposed to different temperatures. Every pigment has a different activation temperature (the point when it changes color). When temperature rises over certain degree, the pigment turns from one color to another or color to colorless (translucent white). But the process is reversible- when it gets HOT or COLD, the pigment turns back to its original color. You can mix Pigments with clear or white glue, varnish, resin, silicone, nail polish, liquid soap, hair dye/mousse/gel, paints, candle wax or any medium corresponding to the surface you want to apply on. Ratio of Powder to Binder is 5% to 15% by weight depending on application and how bright you want your colors. 5 grams container has 3 and 1/5 teaspoons Thermochromic Pigment. 10 grams container has 7 teaspoons... you can calculate how much you need for your project. If you’re not sure what to mix the pigment with, we offer pre-mixed, ready to use : Thermochromic Paint - could be applied on paper, ceramic, metal, plastic, glass, wood, rubber, canvas and many more surfaces. Thermochromic Fabric Paint - could be applied on any type of fabric/textile, leather and shoes. PERFECT FOR COLOR CHANGING FACE MASKS Magic Paints - apply on all types of surfaces, changing with hand touch. Our Color Changing products can be used for Home & School projects, Science Experiments, Arts & Crafts, Hidden Messages or Pictures reveal, Color Changing Slime, Goo, Play doh, Epoxy Tumblers, Nail Art, Jewelry, Escape Room Props, Magic Tricks, Gender Reveal Cards/ Banners, Marriage Proposals, DIY Color Changing T-Shirts & Shoes, Indicators for electronic overheating or wherever your imagination takes you. If you like your project to change color by hand touch, choose activation temperature 72°F(22°C), 77°F(25°C) or 82°F(28°C). Consider the temperature in your room, season or local climate at the time of the experiment and pick a variation accordingly.