Thermochromic Ink
Thermochromic ink is ink that is designed to change color with the change of temperature. The printed image will vanish as the temperature increases above the response temperature of the thermochromic ink. When the temperature lowers below the response temperature the image will revert back to its original color.
Thermochromic ink has various applications including high quality promotional items, advertising, labels, packaging, security documents, textiles, toys, novelties, and anti-counterfeiting for such items as event tickets, lottery tickets. Thermochromic ink can also be used for safety as temperature indicators and warnings for such items as hot drinks and food.
It contains microencapsulated thermochromic pigment that changes from color to colorless as the temperature rises, when the temperature decreased the pigment returns to normal. In aqueous conditions, the pigment is encapsulated, resulting in a slurry mixture, resembling that of plaster-of-paris.
The microcapsule wall of the pigment can endure most standard mixing and application procedures. However, if too much force is used during the mixing or application procedure, the microcapsule will be crushed, and the ability of the ink to change color will be destroyed
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