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Demand for a Sign Pen was so extraordinary that the Tokyo factories could not supply all requests. [8] The Sign Pen was one of Pentel's most successful products with more than two billion units sold. [2] In 1971 the company changed its name to "Pentel Co. Ltd." and one year later, the green rollerball pen with water-based ink, was launched. [2]
A pen is a handheld device used to apply ink to a surface, usually paper, for writing or drawing. [1] Additional types of specialized pens are used in specific types of applications and environments such as in artwork, electronics, digital scanning and spaceflight, and computing.
Gel pens. Compared to other inks, gel ink has higher melting point viscosity, which supports a higher proportion of pigments in the medium.The pigments are typically copper phthalocyanine, carbon black and iron oxides, and the gel is made up of water and biopolymers, such as xanthan gum and tragacanth gum, as well as some types of polyacrylate thickeners.
Close up of an extra fine roller ball pen next to something written with it. There are two main types of roller ball pens: liquid-ink pens and gel-ink pens.The "liquid-ink" type uses an ink and ink-supply system similar to a fountain pen, and they are designed to combine the convenience of a ballpoint pen with the smooth "wet ink" effect of a fountain pen.
The Varsity is a disposable fountain pen that is pre-loaded with ink, while the Prera is a smaller pocket pen. Other offerings include the Pilot Falcon, which has a semi-flexible gold nib. The Kakuno, is a beginner fountain pen meant for children, that is often sold in fun colors, and has a smiley face on the fountain pen's nib.
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.