Erasable pen principle

Erasable pen is a special kind of pen. Its principle is to use heat-sensitive and pressure-sensitive technology to make the ink change reversibly at a specific temperature or pressure to achieve the erasing effect.

1. Thermal ink

The ink used for erasable pen is thermal ink, which is composed of special chemicals. At room temperature, thermal ink appears black or other colors, but the color will change within a certain temperature range. Generally, the temperature range of erasable pen ink is 50℃ to 60℃.

2. Erasing temperature

In order to achieve the effect of erasing, erasable pens need to be erased at a specific temperature. This temperature is usually higher than the friction temperature generated during writing to ensure that the ink can be completely diluted or transparent. The erasing temperature can be achieved by thermal friction, hot air blowing or special erasing tools.

3. Pressure sensitive mechanism

In addition to the heat-sensitive mechanism, the erasable pen also uses the pressure-sensitive mechanism. When the ink is under a certain pressure, the color will also change, thus achieving the erasing effect. This pressure sensing mechanism enables the erasable pen to be erased on ordinary paper without additional tools.

4. Ink recycling

The change of erasable pen ink is reversible, that is, the erased area can be restored to its original color. When the erasable pen ink is exposed to low temperature or light, the ink will change back to its original color. In this way, even if there are mistakes after writing with an erasable pen, they can be corrected by erasing and replying.

5. Application area

Erasable pens are widely used in education, office and other fields. It provides a convenient way for students and office workers to write and modify, which can reduce paper consumption and save resources. At the same time, the erasable pen can also be used as a tool to study marker pens, medical records and other fields because of its reversible characteristics.

The principle and application of erasable pen make writing and modification more convenient and environmentally friendly. Its heat-sensitive and pressure-sensitive mechanisms make the ink change under certain conditions, achieve the erasing effect, and restore the original color through the recovery mechanism. This innovative pen product has been widely used in education and office fields, providing people with a more flexible and sustainable writing experience.