In fact, through the word display principle of thermal paper, we already know how to make the handwriting of thermal paper disappear quickly. In life, we carefully observe the handwriting of thermal paper and find that the handwriting of thermal paper will disappear when the sun shines on it. This is because the chemical reaction is unstable, so the handwriting will disappear under the action of light and temperature. If we want to make the handwriting disappear by ourselves, we can provide the thermal paper with relevant light and temperature, that is to say, destroy its chemical reaction and create an environment for the disappearance of handwriting for the thermal paper.
According to this idea, we can do this. I don't know if you have a Yuba at home. If you have a Yuba at home, you can use a Yuba lamp to illuminate the thermal paper, because it can generate both light and heat. It is good to provide these two factors. If you shine under the Yuba lamp for more than 10 minutes, the words on the thermal paper will disappear, This is a good way to make the words on thermal paper disappear.
The principle of displaying words on thermal paper is temperature. Local high temperature makes the content displayed. Of course, the same principle. As long as you bake with high temperature, the words will disappear quickly, because the whole page will turn black, or use a paper shredder.
How to recover the lost handwriting on thermal paper?
Although the handwriting of thermal paper fades, the blank part that has not been colored still maintains its original nature. The blank part that has not been colored can be colored by heating and controlling the temperature, so as to reproduce the faded handwriting and form the phenomenon of white words on a black background.
Specific method: remove the handwriting, put the thermal paper into the incubator, and control the temperature range, generally 75 ℃ - 100 ℃. After the thermal paper is heated, the original handwriting becomes white and the original blank becomes black, so as to show the handwriting.
If the handwriting is not clear, the color difference before and after color development can be reused, scanned directly with a scanner and processed with PS, so as to enhance the display and fade the picture and text.