Why do we use erasers to erase pencil words?

The eraser can erase pencil words, which is a physical phenomenon. When two identical substances collide and rub against each other, there is a chemical reaction, and it is easy to try. The composition of the pencil and eraser is to set off some of the ingredients on the pencil, and then achieve the effect of wiping.

Some pencils are dark and some are light, so you have to divide them according to their hardness. If the pencil can't be erased, it may not look the way you want it to. <>

The eraser can erase pencil words because the eraser is made of natural rubber.

Synthetic, not lead, very soft in nature. Some erasers are processed by a pencil factory and can be erased with an eraser after writing. The eraser is soft to the touch, and when it comes into contact with the paper, it will wipe off all the stains.

Some of the paper is made of fibers, so it is very easy to erase and clean. <>

If you want to get rid of the trouble that you can't erase, don't let yourself exert a lot of effort when writing, so that you will feel very tired. When writing, if the unevenness of the paper has always had its own, then it may not be that these notes will never disappear. When writing, if you repeat something, it may make the pen mark harder and more complicated.

If you want to get rid of this trouble that can't be erased, you can choose to let the eraser rub on the paper all the time, and it will slowly take away those traces. These substances have a physical process and have been verified to a certain extent, so they will feel very convenient when they are used. When elementary school students are in school, teachers will recommend that students use pencils because they are prone to writing mistakes.

In my opinion, the most important thing to get rid of the trouble of not erasing is to choose a suitable paper. When writing, you must have the correct posture, and you must buy a good eraser to increase the sense of experience. <>

It mainly depends on the role of physical adsorption. The main component of the pencil is graphite, which can be peeled off and attached to the paper to form handwriting through friction, and the eraser is made of rubber, which can be used to absorb graphite by friction to make it fall off.

Because the eraser is made of graphite, when rubbed, the graphite remains on the paper through friction, so it can be erased.

This is because when the eraser is rubbed, it produces debris, which will absorb the graphite powder of the pencil lettering.

Because of the pencil, its refill is graphite, and the eraser can erase the words written on the pencil because it adsorbs graphite. In our youth, or, uh, some special trades, sir, some societies and other trades use erasers and pencils more often. At this point, if you write it wrong, you need to erase**.

Then mainly for the adsorption of graphite. In fact, it is the adsorption action that erases the traces of the um pencil. However, if you use too much force, the effect may not be particularly good, because there are traces after all.

The pencil lead we use is not lead, but graphite. Graphite is black and very soft. It is one of the softest ores in the world.

When we write on paper with a pencil, the pencil lead will drop some small particles due to friction, which will be adsorbed on the paper to form handwriting. Soft graphite and extremely hard diamond are actually made up of carbon, but their hardness varies greatly. The carbon atoms in diamond form a three-dimensional tetrahedral structure.

Like an iron tower, each carbon atom is tightly bound to the four carbon atoms around it, so the existing carbon atoms are tightly connected, so it is difficult to change its shape.

Because the refill is made of graphite, and the paper is made of fiber, the surface is uneven. When people write, graphite dust stays on the fibrous surface of the paper, and it becomes a word. When we rub the handwriting with rubber, the rubber has a stronger friction force.

Therefore, the eraser has stronger friction than paper, which will wipe off a layer of paper, peel the graphite powder from the surface of the paper, make the graphite powder adsorb on the eraser, and then form a large amount of rubber ash, making the paper clean.

When rubber rubs against paper, it produces rubber-like things one after the other. It's like kneading dough. The graphite powder and paper fibers attached to the surface of the paper are wrapped into a rubbery form and removed from the paper so that the pencil marks on the paper disappear.

As a result, the paper, which has been rubbed against the rubber many times, will become thinner and thinner. Rubber erases the text on the pencil, a physical process that removes trace substances from the rubber's contact with the paper. The substance created by the friction of the rubber takes away the graphite and fibers from the paper, making the pencil words disappear.

Because the pencil can write, the main thing is that the pencil contains graphite, and the structural substance of the eraser is relatively special, it can adsorb graphite, and in our visual view, the epithelium can erase the words written by the pencil.

Because the pencil is made of graphite minerals, it is very soft, and the eraser is made of sulfur and other oily substances, so the eraser can erase the pencil words.

Because the pencil writing is generally lead, and the main component of the eraser is iron oxide, and plants have a combination of pumice powder and other substances, but these things can react with lead to a certain extent.

When the eraser rubs against the paper, graphite molecules are generated, and when the graphite molecules are combined with the paper, the pencil font can be erased.

The eraser erases pencil words because the eraser adsorbs refill powder.

Erasers and pencils are commonly used tools for work and study, which play a great role in our lives. Eraser is a substance made of rubber material, which is mixed with pumice powder, iron oxide, vegetable oil, and other substances, and made by process, of which pumice powder is grinded.

Pencil refills, on the other hand, are made from graphite, which is the softest of the minerals. The key reason why pencil words can be erased by the eraser is that the graphite on the pencil is left on the paper by friction, and the eraser powder rubbed off when the eraser erases the words rolls away the graphite together, and then the pencil handwriting disappears.

The history of eraser:

People use erasers to write words, and it has only a history of more than 200 years. Erasers can erase pencil words and were first discovered by the British scientist Priestley in 1770. Before that, people used breadcrumbs to wipe off pencil words.

Priestley's discovery caused a great sensation because it made it easy for people to bury their sections. However, the first erasers were made of natural rubber.

When erasing words, you don't drop crumbs, but you just stick the pencil end to the eraser, and the more you erase it, the dirtier it gets. Later, substances such as sulfur and oil were added to the eraser to make it, so that the eraser could easily shed chips, and the scraped pencil end left the eraser with the debris, so that the eraser could always be kept clean and would not stain the liquid paper.

The above content refers to Encyclopedia - Eraser.