In 177, the British scientist Priest made an eraser from natural rubber. This invention caused a great sensation.

it was 2 years after the invention of the pencil that someone remembered to invent the eraser. Before that, people wiped pencil marks with bread.

However, when using this eraser to erase words, the crumbs will not fall off, but the pencil ends will stick to the eraser, which will get dirtier and dirtier.

Later, people added sulfur and oil when making erasers, and the erased pencil powder left the eraser with the crumbs.

erasers can always be kept clean, and the paper will not get dirty. Since then, it has established the status of eraser.

Extended information:

Principle of eraser:

pencil lead is made of graphite and clay. Graphite is soft, black and easy to attach to paper, so it can write words.

Eraser is very soft, with high friction and some stickiness. Wiping it on paper can stick the written words away without damaging the paper, so it can erase the pencil words.

if you write with a ballpoint pen, the ink will penetrate into the paper, so it is not easy to wipe it off.

reference source: Baidu Encyclopedia-Eraser