... color change from colored to colorless. colorful when temperature is as usual, colorless when temperature is high. As for this type, customer ... , the color changes from one color to another color when temperature changes. Color range: Grass Green, orange, yellow, purple, red, purple ... color. The receive party pay for the postage. 6). Standard temperature:13/15/ 17/22/ 31/ 33/ 37/45/ 65 celsius ...