Color changing principle: the temperature sensitive material of color changing cup is printed on the body of the cup. The material used belongs to thermal sensitive material, with high temperature resistance of 320 degree , non-toxic, lead-free and chromium-free, which can reach the European standard. According to the design of the design plan for the film, plate making, printing, drying, baking, and then packaging.
The color of the thermochromic cup changes when the temperature is above 40 degree , and the color of the cold color cup changes when the temperature is below 20 degree . The color change in water has not been popularized so far.
