1, high-temperature achromatic: high-temperature change is to make the color disappear by rubber friction, but it will develop color when it meets low temperature. The disadvantage is that it is not suitable for long-term storage, and it is even more inconvenient to use in winter. It takes a long time to rub and heat to make the color disappear.
2, microsphere capsules: microcapsule erasable pen is coated with pigment, microsphere particle size is larger than the gap of paper fiber, microsphere pigment is easy to erase. Can be stored for a long time without fading.
Extended data:
Erasable pen characteristics
Erasable pen is a good choice for homework, but when signing important documents or exams, it is best to choose a signature pen. This is because the writing of erasable pen will disappear at high temperature. As shown on the right, the writing of the erasable pen gradually disappears under the baking of the lighter. Therefore, to be on the safe side, please don't use erasable pens for valuable securities and important documents that need to be signed.
Baidu encyclopedia-erasable pen
Baidu encyclopedia-achromatic pen
Baidu encyclopedia-microcapsule