The gum won't rub off. Because rubber contains fragrance, it is because of the addition of various flavors. These perfumes are made of synthetic spices and are likely to contain benzene rings, aldehydes and other substances. Although the content of these substances is very small, long-term exposure is harmful to health. Therefore, the scented eraser can't be wiped off.

Eraser is a tool to eliminate pencil writing marks. Generally, erasers are made of PVC softening and plasticizer, and now they are made of plastic polystyrene elastomer that does not damage the environment.

The historical origin of rubber

In 1770, joseph priestley, a British scientist, 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.

EdwardNaime, another British engineer, is regarded as the inventor of 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.

It was not until 1839 that the inventor CharlesGoodyear discovered that vulcanization could improve the quality of rubber, and the eraser became reliable. Eraser is a tool to eliminate pencil writing marks. Generally, erasers are made of PVC softening and plasticizer, and now they are made of plastic polystyrene elastomer that does not damage the environment.