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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.
Ferrocene and its numerous derivatives have no large-scale applications, but have many niche uses that exploit their unusual structure (ligand scaffolds, pharmaceutical candidates), robustness (anti-knock formulations, precursors to materials), and redox reactions (reagents and redox standards). Use for global cooling has been proposed. [17]
"Reynolds Rocket" pen was introduced at Gimbel’s department store in New York City, selling $100,000 worth of pens on the first day. [2] Demand in 1945 was running 30,000 pens per day, making it America's #1 ballpoint pen. [3] However, within three years the price of the pen went from $12.50 to 50¢.
Byju's (stylised as BYJU'S) is an Indian multinational educational technology company, headquartered in Bengaluru. [4] It was founded in 2011 by Byju Raveendran and Divya Gokulnath . As of October 2024, various media outlets reported that Byju's valuation has now plummeted to zero, down from its peak valuation of $22 billion in 2022.
In 1969, Bic launched its advertising campaign in the United States. A year later, the four-color Bic was launched. The four-color pen allowed one to change the ink color without changing the pen. [13] Bic's ability to mass produce the manufacturing of their pens resulted in low prices. [14] The Conté company was acquired by BIC in 1979. [15]
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.
A ballpoint pen, also known as a biro [1] (British English), ball pen (Hong Kong, Indian, Indonesian, Pakistani, and Philippine English), or dot pen [2] (Nepali English and South Asian English), is a pen that dispenses ink (usually in paste form) over a metal ball at its point, i.e., over a "ball point".
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