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Pencils with sub-millimeter leads can usually hold multiple leads at the same time, reducing the frequency of refills. One exception was the Pentel 350 E, possibly Pentel's first mechanical pencil, [14] which could only hold a single stick of 0.5 mm lead. Refill leads can be bought in small tubes and inserted into the barrel as needed.
Pentel Co., Ltd. (ぺんてる株式会社, Penteru Kabushiki Gaisha) is a privately-held Japanese manufacturing company of stationery products. The name comes from one of their first widely known products and is a portmanteau of the English words pen and pastel. [5] [6] Pentel is also the inventor of non-permanent marker technology.
Toner cartridges cannot be refilled indefinitely, because mechanical parts such as rollers wear out. Some cartridges include the electro-optical drum, which becomes depleted and can be scratched. Organizations refilling cartridges for resale usually clean and test each cartridge to ensure that it is fit for reuse and resale.
Ink cartridges are typically priced at $13 to $75/US fl oz ($1,664 to $9,600/US gal; $440 to $2,536/L) of ink, [15] meaning that refill cartridges sometimes cost a substantial fraction of the cost of the printer. To save money, many people use compatible ink cartridges from a vendor other than the printer manufacturer [citation needed].
George Safford Parker, the founder, had previously been a sales agent for the John Holland Gold Pen Company.He received his first fountain pen related patent in 1889. [3] In 1894, Parker received a patent on his "Lucky Curve" fountain pen feed, [4] which was claimed to draw excess ink back into the pen barrel when the pen was not in use.
Lamy produces fountain pen ink in bottles and proprietary ink cartridges. Lamy provide the widest range of colours in what it designates as T10 cartridges, with black, blue, blue-black, red, green, turquoise and violet. [35] The T10 cartridge has approximately 1.15 ml ink capacity. [36]
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