1. Thermal erasable pens will reappear when cold.

2. The hot erasable pen will reappear when it is cold. When the temperature rises to a certain level, the discoloration temperature adjuster will organize the combination of the color-generating material and the color developer, so that the color disappears. When the temperature drops to very low, the handwriting will reappear after about three minutes.

3. Erasable pens use special polymer materials as the ink base. This ink has larger molecules than the ink molecules of ordinary gel pens. Such carbon will be difficult to be absorbed by the paper. Or seeping, during the writing process, this ink will form an erasable pigment film on the paper, so the writing can be erased with an ordinary eraser.

4. When the temperature is higher than 60 degrees Celsius, the color of the ink will disappear completely, and when the temperature drops below zero degrees Celsius, the color of the ink will reappear.

5. When the white paper with missing writing is placed in a freezer with a temperature of minus 15 degrees Celsius, the writing will slowly recover, and the writing will slowly recover after three minutes