How long can the handwriting of a hot erasable pen be preserved?

There is no specific time limit for writing a thermal erasable pen, and it can generally be kept for about 10 years.

The ink used in thermal erasable pens is different from that used in ordinary gel pens. The main component of ink is heat-sensitive material. When the temperature rises to a certain extent, the ink will become colorless, so the handwriting will "disappear". Hot erasable pens are often used to write daily homework and practice notes.

Because the ink of a hot erasable pen is harmless to health, as long as children don't "eat" erasable pens, it is generally harmless to children's health.

The above information is for reference only, and the specific storage time will be affected by many factors, such as the temperature and humidity of the storage environment.