Fire Eraser
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I wrote with one of this at a exam at math, I still have bad memiries since NOTHING was written on the paper when the teacher wanted to grade it.
What happens when you drop that sheet of paper into a tray of vinegar…? Can't you still make out what used to be visible??
the "secret" would be the heat, not the friction.
Oh come on man what about all the liquid paper companies you just going to put them out of business because they're not cool enough😢
Now put it in the freezer, see if the text comes back 😉
Always amazing!!!
10 years ago my friend let his pupils write a math exam. At that time these pens were quite popular in Austria. He let the sheets in the car. It was a very hot day. Guess what? 😄
This thing was viral is 2019
I smell a new banksy stunt