Observed annually on April 15 is National Rubber Eraser Day. This day celebrates, recognizes and appreciates the invention of erasers. Typical erasers are made from synthetic rubber, but more expensive or specialized erasers are vinyl, plastic, or gum-like materials.
April 15, 1770, Joseph Priestly founded a vegetable gum to remove pencil marks. He dubbed the substance “rubber”.
1770 Edward Nairne developed the first marketed rubber eraser.
1839 Charles Goodyear discovered vulcanization (a method that would cure rubber and make it a durable material) this method made rubber erasers standard.
1858 Hyman Lipman (Philadelphia, Pa.) patented the pencil with an eraser at the end.
1770 Edward Nairne developed the first marketed rubber eraser.
1839 Charles Goodyear discovered vulcanization (a method that would cure rubber and make it a durable material) this method made rubber erasers standard.
1858 Hyman Lipman (Philadelphia, Pa.) patented the pencil with an eraser at the end.
lets see How to Made-Erasers.
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