1. The history of eraser
In 1770, British scientist Joseph Priestley said: "I have seen a substance very suitable for erasing pencil marks."
At that time, rubber pellets cut into small cubes were used throughout Europe to erase 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 Britain and Australia, eraser is called rubber; but in the United States, rubber is one of the common names for condoms. And the name of the 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 in color 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.
The soft polyethylene eraser has a plastic texture and has the same functions as an ordinary pink eraser. These erasers are softer than pink erasers and are less likely to damage paper. Polyethylene erasers are generally white. 2. The Origin and Development History of Eraser
The Evolving Eraser
In the 39 years since the birth of plastic erasers, the manufacturing ingredients have been continuously improved, and Pentel has also begun to sell various types of erasers. eraser.
Generally, erasers are made by softening polyvinyl chloride and adding plasticizer, but now they are made of plastic (poly)styrene elastomer that does not damage the environment to make "(imitation PVC) yes eraser" . Or use the "yes eraser" that recycles materials from abandoned greenhouses. There are also "hi? polymer erasers ain (easy-to-wipe type)" that are less likely to produce eraser crumbs, and "hi? polymer erasers that can concentrate eraser crumbs. polymer eraser ain〈sticky type〉".
"Super Eraser" can remove ink from special paper used for magazine printing or brochures, and "OHP Transparency Eraser" can be used for transparencies used in conferences, etc.
Multi-purpose erasers that combine a variety of properties, such as "portable erasers" that can wipe printed text such as oil-based ball pens and ribbons, are also being developed one after another.
In addition to the materials, the easy-to-hold pen-type eraser "quick eraser" and the ultra-thin "quick eraser" that can be clipped into the workbook can be changed in shape to greatly improve convenience. sexual products.
Since the birth of the eraser in 1770, it has been loved by everyone for its numerous choices and indispensable role as stationery.
Brought by Columbus when he crossed the Atlantic, a small rubber ball turned into an eraser and crossed seven oceans to the world. The seemingly inconspicuous eraser turns out to contain such a profound history 3. The history of eraser
In 1770, British scientist Joseph Priestley said: "I saw a very A substance suitable for erasing pencil marks.
At that time, rubber pellets cut into small cubes were used throughout Europe to erase 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 that he 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 was not 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 two existing things embedded together." Rather than being a new product, the patent was revoked.
The English name of eraser. In Britain 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 will 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 of traces 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.
The soft polyethylene eraser has a plastic texture and has the same functions as an ordinary pink eraser. These erasers are softer than pink erasers and are less likely to damage paper.
Polyethylene erasers are generally white. 4. The history of rubber and paper
Rubber - a brief introduction
Rubber
1. Rubber is the general name for vulcanized rubber, the name for rubber in the UK and Australia.
2. Eraser is a stationery made of rubber that can erase traces of graphite or ink. It is the American name for eraser. There are many types of erasers, with different shapes and colors, including ordinary fragrant erasers, 2B, 4B, 6B and other types of art-specific erasers for painting, as well as plastic erasers, etc.
Eraser - Origin Introduction
Eraser
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 not be damaged. Got dirty.
Eraser - Development History
Eraser
In 1770, British scientist Joseph Priestley said: "I saw a kind of rubber that is very suitable for erasing. A substance that removes pencil marks."
At that time, rubber pellets cut into small cubes were used throughout Europe to erase handwriting. This substance was called rubber.
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 that 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 Existing things are embedded instead of new products) and the patent is cancelled. 5. The history of the development of eraser
In 1770, British scientist Joseph Priestley said: "I have seen a substance that is very suitable for erasing pencil marks." At that time, all Europe used rubber. Rubber particles cut into small cubes are used to erase handwriting. This substance is called eraser.
Another British engineer, Edward Naime, is considered to be the person who invented the eraser, also in 1770. Before that, people used sponges to wipe away handwriting. Naime said he accidentally picked up a piece of rubber to erase writing and 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 instead of new products” and the patent was cancelled. 6. The origin of eraser
People use eraser to erase words. It has only a history of more than 200 years.
Eraser can erase pencil writing, which was first discovered by British scientist Priestley in 1770. Before that, people used sponges to erase pencil writing. The sponge is full of small holes and is soft and elastic. It absorbs water very well, but it is not satisfactory for erasing pencil writing.
Priestley'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 erased pencil ends left the eraser with the chips. In this way, the eraser could always be kept clean and the paper would not be damaged. Got dirty.