Principle 1: it is composed of an outer cup and an inner cup which are arranged coaxial. A sandwich cavity filled with thermally sensitive and discolored volatile liquid is provided between the bottom of the two cups. The outer wall of the inner cup is engraved with an artistic graphic channel which is connected with the layer cavity. After pouring hot water into the drinking cup, the thermal sensitive liquid in the interlayer cavity will produce color changes and rise and escape in the graphic channel of the inner cup, so that the wall of the cup shows artistic patterns, so that people get aesthetic feeling and artistic enjoyment.
Principle 2: Mug adopts thermal transfer printing process, it is necessary to spray a layer of transparent resin paper with some special requirements on the surface of ceramic crafts. Generally, the printer prints the special thermal sublimation ink on the ink-jet or special paper, heated by a certain pressure and temperature, and then transfer the text and text on the coated ceramic glass products. Color-changing mugs are made of thermosensitive color-changing ink, which is also called “reversible color-changing ink” because of its reversible color-changing process. When the temperature rises, the bottom layer is displayed.