This kind of writing disappears when exposed to high temperatures, and children collapse and cry when their homework is heated.

Recently,A student in Jiangsu used an erasable pen to write his summer homework, but all his handwriting "disappeared" due to the heat. The child broke down and cried on the spot.According to the parents of the students, the school encourages children to use erasable pens to write homework so that they can correct mistakes after making mistakes.

After the parents posted the video online, they followed the advice of netizens and put the homework book in the refrigerator.When I took it out the next day, the words that disappeared on the homework reappeared, but I couldn't see them clearly.

Some netizens said: "Fortunately it was not discovered the day before school started, otherwise the sky would have really fallen." "There is a reason to start school."

It is understood that erasable pens use special ink and are refined through special processes. They are divided into erasable ballpoint pens, erasable gel pens, erasable water-based pens, erasable fountain pens, etc.

Erasable pens are also called "hot erasable pens".The writing can be erased with an eraser, but it is also easy to disappear when exposed to heat.

Every winter and summer, "job tragedies" caused by erasable pens occur from time to time.