In the temperature change process, a layer of temperature-sensitive ink is printed on the surface of the product. After reaching a certain temperature, the ink appears transparent and colorless; when it is cooled to a certain temperature, the original opaque color of the ink is restored.

      The principle of the temperature change process: The temperature change material is composed of many temperature change color microcapsules; the temperature change color microcapsules are microcapsules coated with temperature sensitive pigments, which are pigments that change color with temperature changes. Because the thermosensitive pigment is very sensitive to the external environment, the use of microencapsulation technology enhances the stability and durability of the temperature change of the pigment.