An eraser isn’t called an eraser by eraser manufacturers. Their name for the little erasers on pencil ends - “plugs!” ...

To erase pencil, the customary approach was to use ... She described a flat, round rubber eraser mounted on a motor-driven instrument similar to a dentist’s drill. The eraser could remove ...

It can’t have been long after the invention of the pencil that people realised they occasionally made mistakes while using it. Prior to the invention of the rubber eraser we know today ...

The pencil “lead” is actually a mixture of graphite and clay. More clay in the mixture makes the lead harder. A harder lead has a higher number. Pencils are numbered from 1-3 but most people use a ...