9 Interesting Facts About Erasers

Posted By Shopify API Oct 26, 2017

Initially, pencil marks were erased using breadcrumbs.
An eraser contains no more than 20% rubber. If a product is marked "with increased natural rubber content" or "with added natural rubber," it is more advertising than reality. If the rubber content of an eraser is too high, it simply won't erase pencil marks.
Natural rubber is not resistant to high temperatures. Therefore, sulfur is added to the eraser. The entire mass is processed under high pressure and temperature. This process gives the eraser its stretchiness and elasticity.
Graphite is easily erased from paper due to the force of friction, which creates static electricity. Graphite particles become electrified and are attracted to the eraser. This is how we get a clean sheet.
Rubber is not the main component of an office eraser.
Polymer erasers erase graphite just as effectively as rubber-containing ones.
A natural rubber eraser contains rubber, a plasticizer for rubber compounds, sulfur, quartz, chalk, and pumice powder, and a filler.
The hardness level of an eraser is determined by the content of sulfur and fillers. The higher the sulfur content, the harder the eraser.
The first eraser on the end of a pencil was invented by Hymen Lipman in 1858 in America.