Erasers lift graphite from paper by rubbing away tiny fibres along with the marks on them.

The longer version

An eraser is mildly abrasive and slightly sticky. Rubbing it across a pencil mark wears away the top layer of paper fibres, and the crumbs that come away carry the graphite flakes with them. The mark is not dissolved or whitened; it is physically removed together with a little of the surface it was resting on.

Because the mark sits on top of the paper rather than inside it, removal is possible at all; ink soaks in and can only be scraped or covered. Repeated erasing thins the sheet and roughs the surface, so a later pencil line drawn on that spot looks darker and fuzzier than the surrounding paper.

Where this entry sits

Odd Little Things looks at the ordinary objects people touch every day and the small mechanisms and histories hiding inside them. Buttons, zips, pencils, mirrors, stairs, stamps, packaging, and road signs all get their turn. The full list sits on the Odd Little Things page, where every entry is listed in order.