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At the 1889 World Fair in Paris, the Hardtmuths displayed their pencils rebranded as "Koh-I-Noor Hardtmuth". Each pencil was encased in a yellow cedar-wood barrel. The inspiration for the name was the Koh-i-Noor diamond (Persian for "Mountain of Light"), part of the Crown Jewels of the United Kingdom, and the largest diamond in the world at the ...
Until that time, whole pieces, cut from graphite, were glued in between wood and were imported from England. With the new method, graphite of inferior quality could be used in pencil manufacturing, lowering the price and making the product more accessible for the masses. His company Koh-i-Noor Hardtmuth still exists.
This method of manufacture, which had been earlier discovered by the Austrian Joseph Hardtmuth, the founder of the Koh-I-Noor in 1790, remains in use. In 1802, the production of graphite leads from graphite and clay was patented by the Koh-I-Noor company in Vienna. [24] In England, pencils continued to be made from whole sawn graphite.
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Several companies such as Pentel, Pilot, and Uni-ball (Mitsubishi Pencil Co.) currently manufacture colored refill leads in a limited range of diameters (0.5 mm, 0.7 mm, or 2.0 mm) for their own products, as well as "variety packs" consisting of different colors of leads for those who want to trial different colors of lead. Koh-i-Noor makes ...
The Koh-i-Noor diamond then went to legendary jewelry lover Queen Mary, who, true to form, had court jeweler Garrard stud her Art Deco-inspired coronation masterpiece with not only this 105.6 ...
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