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Free Text, Sticky Notes or Popup. Objects to give the PDF page a cleaner, more professional look. Insert a blank page or new PDF pages. Unsourced material may be challenged and removed. Erasers have a rubbery consistency and come in a variety of shapes, sizes and colours. Some pencils have an eraser on one end. The term is also used for things that remove writing from chalkboards and whiteboards.
Ink erasers are denser so it allows them to erase pen marks. Before rubber erasers, tablets of wax were used to erase lead or charcoal marks from paper. Tokyo student said: “Bread erasers were used in place of rubber erasers, and so they would give them to us with no restriction on amount. So we thought nothing of taking these and eating a firm part to at least slightly satisfy our hunger.
Nairne sold natural rubber erasers for the high price of three shillings per half-inch cube. According to Nairne, he inadvertently picked up a piece of rubber instead of breadcrumbs, discovered rubber’s erasing properties, and began selling rubber erasers. April 15, 1770, in a footnote: “I have seen a substance excellently adapted to the purpose of wiping from paper the mark of black-lead-pencil. It is sold by Mr. Nairne, Mathematical Instrument-Maker, opposite the Royal-Exchange. However, raw rubber was perishable.