Friction pen is a special kind of pen. After writing on white paper with this pen, the handwriting will disappear after high temperature is generated by special rubber friction. When the paper is frozen in the refrigerator, the handwriting on the paper will reappear.

principle

The biggest feature of friction pen is imported ink. When this special ink is written in an environment above 60 degrees, the color of the ink will naturally disappear and become transparent. When the temperature is lower than-10 degrees, the erased handwriting will appear again.

come to the point

The appearance of the friction pen is not fancy, and it is no different from the ordinary water-based pen, except that there is a white rubber head at the end of the pen, and the pen is marked with "Do not use important documents such as signature".

price

The price of this pen is much higher than that of ordinary water-based pen, but the price of refill replacement is 8 to 12 yuan, while the price of 0.5 mm erasable gel pen is 12 yuan, and the price of 0.4 mm superfine steel ball erasable gel pen is 10/7 yuan. In addition, this pen also has highlighter series, which can be recovered at low temperature after being erased, and the price is around 15 yuan. [ 1]?