Pencil Marks facts
While investigating facts about Pencil Marks On Wall and Pencil Marks On Skin, I found out little known, but curios details like:
Before the Eraser was invented people used soft bread crumbs to erase pencil marks
how to remove pencil marks from wall?
People originally used bread to erase pencil marks. In 1770, Edward Naine accidentally picked up a piece of rubber and found it to be very effective at erasing pencil marks, which prompted him to begin selling rubber erasers. Erasers exist to correct mistakes, and was invented because of one.
What takes pencil marks off painted walls?
In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across answering what takes pencil marks off walls. Here are 11 of the best facts about Pencil Marks Off Wall and Pencil Marks On Toilet Paper I managed to collect.
what removes pencil marks?
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Rubber, despite its many uses now, was called "rubber" because it rubs out pencil marks.
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A French explorer observed South American native Indians using a tree resin to make bouncing balls. He brought the resin back home, where it was discovered it could rub out lead pencil marks; hence the term "rubber."
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The reason #2 pencils are so widely used in testing is because early scantron machines couldn't detect marks made by harder pencils, so using No. 3 and No. 4 pencils would result in having exams scored incorrectly. No. 1 pencils would smudge, so No. 2 pencils became an industry standard.
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An English engineer named Edward Naime invented the eraser in 1770. Up until that time, people usually used rolled-up pieces of white bread to erase pencil marks.
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Rubber got its name from the ability to rub out lead pencil marks
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Rubber got its name from being used to "rub" away errant pencil marks by British chemist Joseph Priestley
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Andre Geim and Konstantin Novoselov won their Nobel Prize in Physics basically for "peeling off pencil marks with Scotch tape"..
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Before erasers were invented people removed pencil marks with bread crumbs
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IKEA pencils are used by surgeons to mark bones
