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Eraser, in Britain and Australia, eraser is called eraser; ; But in America, rubber is one of the common names of condoms, and the name of eraser is eraser. This difference is often regarded as a joke by Americans. Now there are many kinds of erasers to meet different needs.
In 1770, British scientist joseph priestley said, "I saw a substance that is very suitable for erasing pencil handwriting." At that time, the whole of Europe used rubber particles cut into small cubes 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. Naimei said that once he accidentally picked up a 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. Until 1839, inventor Charles? Goodyear found that vulcanization can improve the quality of rubber, and the eraser becomes reliable.
1858, a Lippmann in Philadelphia, USA, obtained a patent for embedding an eraser at the end of a pencil, but later the patent for this pencil with an eraser was cancelled because it was judged as "just embedding two existing things together, not a new product".
Eraser is made of PVC material, but plasticizer ATBC is added. Using physical principles (non-magic pen) to peel off the handwriting (not just pencil words) on the surface of the writing object (excluding erasing tape and correction fluid).
(ATBC (tributyl acetylcitrate) is a non-toxic plasticizer with strong solubility, oil resistance, light resistance and mildew resistance. Mainly used as plasticizer for PVC, cellulose resin, vinyl resin and synthetic rubber.