Check the listing for details. THERMOCHROMIC TEMPERATURE COLOUR CHANGING PIGMENT - DARK BLUE TO LIGHT BLUE. Condition: New. Listed at 8.67 USD. Thermochromic Pigment Powder - Dark Blue to Light Blue All of our Thermochromic pigments change at 31 degrees Celsius and revert back to the original colour below this temperature Thermochromic pigments are a type of colour-changing pigment that respond to changes in temperature. They are designed to change colour or become transparent when exposed to heat, and then revert back to their original colour as they cool down. Thermochromic pigments are made up of microcapsules or microspheres containing a colourant that is sensitive to temperature. These microcapsules are typically mixed into paints, inks, or coatings, allowing them to be applied to various surfaces. The pigments are engineered to undergo a reversible colour change at a specific temperature range, known as the activation or tr.