Question 1: How to make eraser? Production of erasers:
1. The petroleum processing plant transports powdered or liquid synthetic rubber to the rubber manufacturing plant. If natural rubber is to be used, it comes in solid hunks, and workers must first break it down to dissolve it.
2. Mix the rubber with ground pumice powder (which can make the rubber slightly rougher), iron oxide (which can make the rubber turn pink), vegetable oil, sulfur and other substances.
3. Heating the mixture causes sulfur to mix with the rubber to increase the strength of the rubber and make it more durable.
4. Feed the soft, still warm raw material into the stamping machine (squeeze into a die) to make a long and thin rubber stick. Cut the rubber stick into small sections with a knife, wait for it to cool, and then transport it to the pencil factory to make erasers on pencils.
5. Block erasers used alone are made by injecting heated rubber mixture into molds of various shapes. After cooling, open the mold and erasers of various shapes will come out.
(6. Print on the eraser)
Eraser
1. Vulcanized rubber general name.
2. Stationery made of rubber can erase traces of graphite or ink.
The reason why the eraser can erase the pen writing is not a chemical reaction. Pay close attention to the fact that the eraser can actually remove the pen writing. Erased, this is the reason why the eraser is reduced little by little, and it is also the reason why many people blow on the paper after using the eraser, because there are a lot of eraser scraps left on it, and if you look carefully at the eraser scraps, you will see the black stuff. Pen handwriting.
Question 2: How is eraser made? Eraser can erase pencil writing. It was first discovered by British scientist Priest in 1770. Before that, people used bread to wipe their pencils. Priest's discovery caused a great sensation because it brought great convenience to people. However, the earliest erasers were made of natural rubber. They did not shed any scraps when erasing. They just stuck the pencil ends on the eraser, which made them dirtier the more they were erased. Later, people added substances such as sulfur and oil when making eraser, which made the eraser chip easily. The erased pencil ends left the eraser with the chips. In this way, the eraser could always be kept clean and the paper would be removed. Got dirty.
Question 3: How to make an eraser yourself? Pick your nose every day and stick it together. Over time, you will get a black ball. Rub it hard to make it into a rectangular shape. You can use it after exposing it to the sun for a few days.
Question 4: How is the eraser made? They are divided into natural ones and synthetic ones. The synthetic ones are mainly polymers formed by the addition polymerization reaction of some organic substances.
A long time ago, people used bread to wipe pencil writing. In 1700, a British scientist
invented the eraser. Later, after continuous improvement, today’s eraser It can easily erase pencil writing
without staining the paper, and the eraser itself is clean.
We already know that the reason why pencil can write Well, it's because the powder from the pen core enters the gaps in the paper
. When we use an eraser to erase pencil writing, the debris falling from the eraser can Stick down the pencil powder and wrap it up. The powder could no longer stay in the gaps in the paper, so it had to escape.
The writing disappeared, leaving only some eraser on the paper that fell off when blown. Residue.
Ordinary erasers cannot erase the words written with a pen, because the ink seeps into the fiber of the paper.
The words written with a wax stick, Because it contains slippery wax, it cannot be erased with an eraser.
Pencil lead is made of graphite and clay. Graphite is soft, black in color, and easily adheres to paper, so it can be written.
The eraser is very soft, has high friction, and is somewhat sticky. When rubbed on the paper, the written words will stick away without damaging the paper surface. Therefore, the eraser can erase the pencil writing. If you write with a ballpoint pen, the ink will penetrate into the paper and be difficult to erase.
In 1770, British scientist Joseph Priestley said: "I have seen a substance very suitable for erasing pencil writing."
At that time, the whole of Europe was Use rubber pellets cut into small cubes to wipe away handwriting. This substance was called eraser.
Another British engineer, Edward Naime, is considered to be the person who invented the eraser, also in 1770. Before that, people used bread crumbs to erase handwriting. Naime said he once accidentally picked up a piece of rubber as a crumb, but found that it worked very well, so he started producing and selling erasers.
The early erasers were not very convenient because unprocessed rubber was prone to decay. It wasn't until 1839, when inventor Charles Goodyear discovered that vulcanization could improve the quality of rubber that erasers became reliable.
In 1858, a man from Philadelphia, USA, obtained a patent for embedding an eraser into the tail of a pencil. However, this pencil with an eraser was later judged to be "just a combination of two items." Existing things are embedded together instead of new products" and the patent was cancelled.
The English name of eraser
In the UK and Australia, eraser is called rubber; but in the United States, rubber is one of the common names for condoms, and the name of eraser is eraser . This distinction is often used as a joke by Americans.
Today there are many types of erasers to meet different needs.
Some pencils have a small eraser at the end. These erasers are mostly pink and have a smooth gum surface. They perform well in most situations, but sometimes they can mess up the paper. If you apply too much force, the eraser may break the paper. When the handwriting is erased, the eraser leaves residue on the paper. If not cleaned properly, these residues can leave marks on the paper.
Another type of eraser is the brown eraser commonly used by artists, which is made of soft but rough rubber. Its design makes it easy to erase large areas without tearing the paper. But this eraser cannot erase handwriting very effectively and accurately.
Another type of eraser commonly used by artists is called a soft eraser. It is mainly made of a gray material and is similar to gum. Its strength prevents it from leaving any residue, so its lifespan is longer than other erasers. It removes handwriting by "absorbing" graphite. This eraser can not only erase handwriting (in fact, it can remove handwriting accurately), it can also be used to highlight important parts or make the work more detailed. However, it's not good at removing large areas of handwriting, and can smudge or even stick to paper if exposed to excessive heat.
Question 5: How is rubber produced? The production process of rubber
1. The petroleum processing plant transports powdered or liquid synthetic rubber to the rubber manufacturing plant. If you want to use
natural rubber, it comes in strong hunks, and workers have to crush it first to dissolve it.
2. Combine rubber with ground pumice powder (can make the rubber slightly rougher), iron oxide
(can make the rubber turn pink), vegetable oil, sulfur Mixed with other substances.
3. Heating the mixture causes sulfur to mix with the rubber to increase the strength of the rubber and make it more durable.
4. Feed the soft, still warm raw material into the punching machine (squeeze into a die to make
a long and thin rubber stick. Use a knife to cut the rubber stick Cut it into small pieces, wait for it to cool, and then transport it to the pencil factory to make erasers on pencils.
5. The block rubber used alone is made by injecting the heated rubber mixture into molds of various shapes
. After cooling, open the mold and rubber in various shapes will come out.
Question 6: How is rubber made? Eraser is made of rubber. Rubber is divided into natural rubber and synthetic rubber. Natural rubber is made by collecting sap directly from oak trees, and then processing the sap into rubber. 100 years ago, scientists had already studied the composition of natural rubber. They distilled oak sap to obtain a liquid, which is known to contain 5 carbon atoms and 8 hydrogen atoms in each molecule, called isoprene. Synthetic rubber is made from isoprene. The French chemist Boussard heated the isoprene produced by the carbonization of natural rubber with concentrated hydrochloric acid to obtain a product similar to natural rubber. This new product is distilled to obtain isoprene. With this major discovery, people can synthesize their own rubber
Since its introduction in 1956, plasticine has become a favorite toy of children. In the beginning, plasticine was only gray and white, but in the following years, plasticine came in a variety of colors and scents. Including luminous, gold, silver, shampoo scent, shaving lotion scent, etc. With just a few common ingredients in your kitchen, you can make this traditional set of playdough with your kids. What an exciting process it is. Ingredients: Unsweetened beverage powder, a cup of water, a spoonful of vegetable oil, food coloring, 1/2 cup of salt, a cup of white flour. Method: 1. Dissolve the drink mix in the water in a saucepan over a simmer. 2. Add vegetable oil and stir. 3． If you want a darker color, add a few drops of food coloring. 4. Pour the salt and flour into the pot and stir until the mixture forms many small lumps. 5. Continue stirring until the mixture is mushy and has no air bubbles. 6. Place the mixture on a windowsill to dry, then mix the dough and place it in an airtight container. Note: Although this plasticine is brightly colored and has a pleasant aroma, it is not edible! Younger children will be more interested in edible plasticine.
Question 7: How is rubber made? Rubber is made from special glue, oil, and stone powder, and then processed by a machine to become rubber. This is the simplest way to make white rubber. If there is anything else If you have any questions, please 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 you want to use for erasing, and then cut off the excess paper with a ruler (it doesn't matter whether you use a ruler or not! Just use whatever you want to remove the excess! But if you want it to look beautiful If it’s a little bit, it’s better to use a ruler or scissors~Dear~) Finally, wrap the wrapped rubber with another layer of tape and it’s ok! (If you still want it to look better, just use beautiful paper that you think looks better!)
I hope you will adopt it! ! Dear~
Question 9: How to make a simple rubber stamp with plain rubber
1 First, print the A4 drawing and then use a utility knife, a small yellow, a pick, and a rubber brick (The red one), plastic rubber. Let’s talk about the plastic eraser. I believe anyone who has done sketching knows about the plastic eraser. If you roll it on the rubber brick, the pencil marks and ink pad marks will all disappear! When it comes to the ink pad, you will know it as soon as you hear the name. Put the ink pad on the eraser, then put the eraser on the paper, and a miracle will happen! There is also a utility knife for cutting rubber, which is of great use! There is also a pick, which is used to deepen the pattern when transferring. There will be a tutorial on this later. Rubber bricks can be purchased on Taobao. Some people have asked, what is the difference between rubber bricks and rubber? Let me tell you, rubber bricks are a kind of rubber specially used for engraving seals. To be precise, they are easier to use than rubber. Of course, ordinary rubber can also be used.
Question 10: What material is rubber made of? .Eraser can erase pencil writing, which was first discovered by British scientist Priest in 1770. Before that, people used bread to wipe their pencils.
Priest's discovery caused a great sensation because it brought great convenience to people. However, the earliest erasers were made of natural rubber. They did not shed any scraps when erasing. They just stuck the pencil ends on the eraser, which made them dirtier the more they were erased. Later, people added substances such as sulfur and oil when making rubber, which made the rubber chip easily. The scraped pencil ends left the rubber with the chips. In this way, the eraser could always be kept clean and the paper would not be damaged. Got dirty.