Do you mean how to erase the red eraser? 1. You can use a hair dryer to blow hot air to keep warm. 2. Lighter baking. 3. The eraser rubs and heats up.

Erasable pen is a special pen with ink and oil, and the handwriting will gradually disappear at high temperature.

At present, there are two kinds of erasable pens on the market: high temperature decoloration and microsphere capsules. High temperature change is to use rubber friction heating to make the color disappear, low temperature will develop color, not suitable for long-term storage; Microsphere capsule erasable pen uses microspheres to wrap raw materials. The particle size of microspheres is larger than the gap of paper fibers, which is easy to be erased and can be stored for a long time without fading.