An eraser is an article of stationery that is used for removing writing from paper. Here are some eraser fun facts from The Encyclopaedia of Trivia
It took 200 years after the invention of the lead pencil in 1564 for somebody to dream up the eraser. Until then, draughtsman had to use bread.
Rubber, like bread, was perishable. In 1839 the tire tycoon Charles Goodyear pioneered a more durable vulcanised rubber, sealing the future of the eraser.
Hymen Lipman conceived the all-in-one pencil eraser, an innovation that earned him a patent on March 10, 1858. Lipman sold his patent to Joseph Reckendorfer for $100,000 four years later.