Hot achromatic erasable gel pen, by friction or any other heating method to eliminate the color of the ink, when cooled to a certain temperature, the color can be returned, the principle of color appear and disappear are implement repeatedly mainly through microcapsule pigments in the ink.
The ink is colored at normal temperature, heated to 50℃-60℃, and cooled down to minus 5℃-20℃ for color appear ,it has reversibility. Specifically, the temperature of fade is about 45℃ and the temperature of complete fade is about 55℃. The starting color temperature is about -5℃ and the full color temperature is about-20℃.