Feature: This thermochromic pigment changes at 88F (31 C) from colored to transparent This heat-sensitive pigment is perfect for a wide range of arts and crafts and mixes well with most mediums, paints, and resins. Make your own heat-sensitive mugs, secret messages, mood rings, nail polish, slime/goo, or whatever you can imagine. How To Use: Simply add pigment to a clear base and mix well. Keep in mind that mixing generates heat which may temporarily change the color of the mixture. It is recommended to start with a very small amount of pigment and add more until the desired color is achieved. A ratio of 1 part pigment to 20 parts base is a good starting point. Specification: Types: At 88F (31 C) colored to transparent Color: 12 Colors Weight: approx. Every Color 3g Per Box Quantity:12 Boxes. Note: The pigment may be warm from shipping. For best results, refrigerate for 1 hour prior to use. And it will be color difference what u received, because of Thermochromic Characteristic,please understand. Package Included: 12 Colors x Thermochromic Pigment .