The two-color eraser is very famous and was part of most childhoods, adolescences and even adulthood. It is known to have a red side, which is more malleable, and a blue side which is very rigid.
This blue part has already fooled many people, because it is more rigid and blue, most people used it to erasing ballpoint pen ink and ended up erasing and tearing many pages in an attempt to failure. But then, how to use the blue side of the two-color eraser?
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As we know, rubber has two sides, one red and one blue. The rubber on the blue side is smaller as compared to the red one and stiffer as well. But it's not for nothing, it has a function that most don't know about.
Contrary to popular belief, the blue side is not for erasing ballpoint pen ink. But to erase pencil writings on more rigid structures, such as wood, cardboard, plastic, styrofoam and other places. But what is the difference then in erasing with the blue part and not with the red part?
The blue part, being hard and rougher, has an abrasive effect, as it is made up of small, pointed crystals. So it ends up working like sandpaper on harder surfaces, being more effective when erasing something.
Therefore, because it is composed of sharp crystals and acts like sandpaper, when trying to erase the ballpoint pen ink from a paper, the sheet ends up being punctured. That is, it does not just erase the ink, as in the case of the red side. Yeah, the rubber on the blue side acts by wearing down the sheet and then tears the paper.
However, when used on sheets with heavier weights, such as cardboard, with the erase pen function, it can until it is effective in removing what has been written, but it will act just as well, eroding the first layers of the sheet.
A curious fact is that the manufacturer once intended to remove pen ink from paper, but this ink acts in a different way. different shape of the pencil on the sheet, penetrating the fibers of the paper, while the pencil covers only the most external.
So, now that you know how to use the blue side of the eraser, take the opportunity to forward this article to your friend who would also like to know.
