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Archived from the original on 15 March This test defines a "pencil hardness" of a coating as the grade of the hardest pencil that does not permanently mark the coating when pressed firmly against it at a 45 degree angle. The usefulness of graphite for pencils was discovered as well, but graphite for pencils had to be smuggled. Rocket City Space Pioneers. Historian Henry Petroski notes that while ever more efficient means of mass production of pencils has driven the replacement cost of a pencil down, before this people would continue to use even the stub of a pencil. In addition, once a sufficient stock of the graphite was mined, the mine itself would be flooded until more graphite was needed.


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RAL 7024 / Graphite grey / #474a51 Hex Color Code

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Other companies then copied the yellow colour so that their pencils would be associated with this high-quality brand, and chose brand names with explicit Oriental references, such as Mikado renamed Mirado [83] [84] and Mongol. Sheogorath April 13, Graphite Pencis , koh-i-noor. Residual graphite from a pencil stick is not poisonous, and graphite is harmless if consumed. Timberlines Blog "Mongolized" 31 August


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Archived from the original on 10 September Archived from the original on 6 November Lilianne April 23, 7: One effect of this was that "during World War II rotary pencil sharpeners were outlawed in Britain because they wasted so much scarce lead and wood, and pencils had to be sharpened in the more conservative manner — with knives. American colonists imported pencils from Europe until after the American Revolution. As well as simply being distinctive, the colour may have been inspired by the Austro-Hungarian flag ; it was also suggestive of the Orient at a time when the best-quality graphite came from Siberia. Pencils create marks by physical abrasion , leaving behind a trail of solid core material that adheres to a sheet of paper or other surface.


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