How to make an eraser?

Question 1: How to make an eraser? Making of eraser:

1. Oil processing plants transport synthetic rubber in powder or liquid form to rubber manufacturing plants. If you want to use natural rubber, it will be very strong and big. Workers must first crush it and dissolve it.

2. Mix the rubber with ground pumice powder (which can make the rubber slightly hard), iron oxide (which can make the rubber pink), vegetable oil, sulfur and other substances.

3. Heat the mixture to mix sulfur with rubber to increase the strength of rubber and make it more durable.

4. Feed the soft and still warm raw materials into a punching machine (squeeze them into a mold) to make a slender rubber rod. Cut the rubber stick into small pieces with a knife, wait for it to cool, and then transport it to the pencil factory to make the eraser on the pencil.

The single-use eraser is made by injecting the heated rubber mixture into molds of various shapes. After cooling, open the mold and erasers of various shapes will come out.

(6) Print words for the eraser

eraser

1. vulcanized rubber.

Stationery made of rubber can erase traces of graphite or ink.

The reason why an eraser can erase pen handwriting is not a chemical reaction. Pay close attention to it. Eraser pen handwriting is actually an eraser that can stick to the pen handwriting, and then drop it bit by bit, and the pen handwriting will be erased. This is the reason why erasers are decreasing bit by bit, and it is also the reason why many people have to blow paper after using erasers, because there are a lot of rubber crumbs left on them. If you carefully observe the rubber crumbs, the black things are pen handwriting.

Question 2: How is the eraser made? Eraser can erase pencil words, which was first discovered by British scientist Priest in 1770. Before that, people wiped pencils with bread. Priest's discovery caused a great sensation because it brought great convenience to people. However, the earliest erasers were made of natural rubber. When you erase a word, it doesn't drop crumbs. It just glued the pencil tip to the eraser, and the more it rubbed, the dirtier it got. Later, when people made erasers, substances such as sulfur and oil were added, which made the erasers easy to lose crumbs, and the erased pencil crumbs were left on the erasers together with the crumbs. In this way, the eraser can be kept clean all the time, and the paper will definitely get dirty.

Question 3: How to make your own eraser? Pick your nose every day and stick it together. As time goes by, you will get a black ball, rub it hard to make it into a cuboid shape, and put it in the sun for a few days before you can use it.

Question 4: How is the eraser made? There are natural polymers and synthetic polymers, mainly some organic polymers formed by addition polymerization.

Long ago, people used bread to erase the words on pencils. 1700, British

Scientists invented rubber, and after continuous improvement, today's rubber can easily erase lead.

Pen handwriting will not stain the paper, and the eraser itself is clean.

We already know that pencils can write because the powder of the refill enters the paper.

When we write with an eraser and pencil, the crumbs falling from the eraser will

Glue the pencil powder and wrap it. Powder can't stay in the gap of the paper, so it must run out.

The handwriting disappeared, leaving only some rubber residue on the paper.

Words written with a pen can't be erased with an ordinary eraser, because ink will penetrate into the fibers of the paper.

Yes Words written with wax sticks can't be erased with an eraser because they contain smooth wax.

Pencil lead is made of graphite and clay. Graphite is soft, black and easy to stick to paper, so you can write. Rubber is very soft, with high friction and certain viscosity. If you wipe it on the paper, you can stick the written words together without damaging the paper, so you can erase the pencil words with an eraser. If you write with a ballpoint pen, the ink will penetrate into the paper and will not be easily erased.

1770, British scientist Joseph? Priestley said: "I saw a substance that is very suitable for erasing pencil handwriting. 」

At that time, rubber particles cut into small squares were used throughout Europe to erase handwriting. This substance is called an eraser.

Edward Gnehm, another British engineer, is believed to have invented the eraser in 1770. Before that, people used bread crumbs to erase handwriting. Naime said that he once accidentally picked up a piece of rubber as bread crumbs, but found that the effect was very good, so he began to produce and sell rubber.

The original eraser was inconvenient, because the unprocessed eraser was easy to rot. It was not until 1839 that the inventor Charles Goodyear discovered that vulcanization could improve the quality of rubber, so the eraser became reliable.

1858, a man from Philadelphia, USA, obtained a patent for embedding an eraser into the tail of a pencil. However, the patent of this pencil with eraser was later revoked because it was judged as "only embedding two existing things together, not a new product".

English name of eraser

In Britain and Australia, erasers are called erasers; ; But in the United States, rubber is one of the common names of condoms, and the name of eraser is eraser. This difference is often used as a joke by Americans.

Now there are many kinds of erasers to meet different needs.

Some pencils have a small eraser at the end. Most of these erasers are pink, and the surface is smooth gum. They perform well on most occasions, but sometimes they get stuck on paper. If you push too hard, the eraser still has a chance to damage the paper. When erasing handwriting, the eraser will leave a residue on the paper. If it is not cleaned properly, these residues will leave marks on the paper.

Another kind of eraser is the brown eraser commonly used by artists, which is made of soft and rough rubber. Its design is easy to erase large areas of traces and will not damage the paper. But this eraser can't erase handwriting effectively and accurately.

Another eraser commonly used by artists is called soft eraser. It is mainly made of gray material and rubber with gum. Its strength makes it leave no residue, so its life is longer than other erasers. It eliminates handwriting by "absorbing" graphite. This eraser can not only erase handwriting (in fact, it can accurately erase handwriting), but also be used to highlight important parts or make works more detailed. However, it is not good at removing large areas of handwriting. If it is heated excessively, it will stain or even stick to paper.

Question 5: How is rubber produced? Rubber manufacturing process

1. Oil processing plants transport synthetic rubber in powder or liquid form to rubber manufacturing plants. If you want to do it,

Natural rubber is hard and big. Workers must first crush it and dissolve it.

2. Mix the rubber with ground pumice powder (which can make the rubber a little harder) and iron oxide.

(can make rubber pink), vegetable oil, sulfur and other substances.

3. Heat the mixture to mix sulfur with rubber to increase the strength of rubber and make it more durable.

4. Send the soft, still warm raw materials to the punch (squeeze them into the punch and finish)

A slender rubber rod. Cut the rubber rod into small pieces with a knife, let it cool, and then transport it to the pencil.

This factory produces pencil erasers.

5. Bulk rubber used alone is to inject the heated rubber mixture into various shapes.

Made in the same mold. After cooling, open the mold and erasers of various shapes will come out.

Question 6: How is the eraser made? Rubber is made of rubber. Rubber can be divided into natural rubber and synthetic rubber. Natural rubber directly collects the sap of oak trees, and then processes the sap of oak trees into rubber. Scientists have studied the composition of natural rubber 100 years ago. They dry distilled oak liquid to get a liquid, which is known to contain 5 carbon atoms and 8 hydrogen atoms per molecule, and is called isoprene. Synthetic rubber is made of isoprene. French chemist Bhusal heated natural rubber with concentrated hydrochloric acid to dry distill the decomposed isoprene, and obtained a product similar to natural rubber. Dry distillation of new products to obtain isoprene. With this great discovery, people can synthesize rubber by themselves.

Since 1956 came out, plasticine has become children's favorite toy. At first, plasticine was only gray, but in the following years, plasticine had various colors and smells. Including luminous, gold, silver, shampoo, shaving water and so on. As long as you have some common ingredients in your kitchen, you can make this traditional plasticine with your children. What an exciting process. Ingredients: sugar-free beverage granules, a glass of water, a spoonful of vegetable oil, food coloring, 1/2 cups of salt, and a cup of white flour. Practice: 1. Melt the beverage particles in the water with a small boiling pot. 2. Add vegetable oil and stir. If you want a darker color, add a few drops of food coloring. 4. Pour the salt and flour into the pot and stir, the mixture will form many small pieces. 5. Continue stirring until the mixture becomes paste and there are no bubbles. 6. Dry the mixture on the windowsill, then mix the noodles and put them in a sealed container. Note: Although this plasticine is bright in color and fragrant in smell, it is not edible! Younger children will be more interested in edible plasticine.

Question 7: How is rubber made? It is made of rubber, oil and stone powder, and then it is machined. This is the easiest way to make white rubber. If you have any questions, ask me.

Question 8: How to make an eraser cover? First, prepare a piece of paper, a ruler and a transparent tape. Wrap the eraser in paper to expose the part to be used, and then cut off the excess paper with a ruler (it doesn't matter whether you use a ruler or not! Use whatever you want, and get rid of the extra parts! But if you want to look beautiful, you'd better use a ruler or scissors ~ dear ~) Finally, just wrap the wrapped rubber with tape! If you want to look better, use the beautiful little paper that you think looks better! )

I hope to adopt it! ! Dear ~

Question 9: How to make a simple rubber stamp?

1 Print A4 drawings first, then the art knife, Xiao Huang, pick, rubber brick (the red one) and plastic rubber. Let's talk about plastic erasers here. I believe everyone who has drawn a sketch of a plastic eraser knows that when you roll it on the rubber brick, the pencil marks and the inkpad marks disappear! Speaking of inkpad, you can know the name as soon as you hear it. Put the printing pad on the rubber, and then print the rubber on the paper, and a miracle will appear! There is also an art knife, which is used to cut rubber. It is very useful! There is also a pick, which deepens the pattern when it is transferred. There will be a tutorial later. Rubber bricks can be bought in Taobao. Someone asked, what's the difference between a rubber brick and an eraser? I tell you, rubber brick is a kind of specially carved rubber, which is more accurate than rubber. Of course, ordinary rubber can also be used.

Question 10: What material is rubber made of? Erasers can erase words from pencils, which was first discovered by British scientist Priest in 1770. Before that, people wiped pencils with bread. Priest's discovery caused a great sensation because it brought great convenience to people. However, the earliest erasers were made of natural rubber. When you erase a word, it doesn't drop crumbs. It just glued the pencil tip to the eraser, and the more it rubbed, the dirtier it got. Later, when people made rubber, they added substances such as sulfur and oil, which made the rubber easily fall off from the crumbs. The broken pencil leaves an eraser with crumbs, so that the eraser can always be clean and the paper will not be dirty.