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Radite
Radite is a trade name for an early plastic, formed of pyroxylin Nitrocellulose (also known as cellulose nitrate, flash paper, flash cotton, guncotton, pyroxylin and flash string, depending on form) is a highly flammable compound formed by nitrating cellulose through exposure to a mixture of nitric acid and ... - a partially nitrated cellulose - introduced by the Sheaffer Pen Company in the 1920s when plastics were first used as a material for pen manufacture. Plastics {{Tech-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plastic
Plastics are a wide range of synthetic or semi-synthetic materials that use polymers as a main ingredient. Their plasticity makes it possible for plastics to be moulded, extruded or pressed into solid objects of various shapes. This adaptability, plus a wide range of other properties, such as being lightweight, durable, flexible, and inexpensive to produce, has led to its widespread use. Plastics typically are made through human industrial systems. Most modern plastics are derived from fossil fuel-based chemicals like natural gas or petroleum; however, recent industrial methods use variants made from renewable materials, such as corn or cotton derivatives. 9.2 billion tonnes of plastic are estimated to have been made between 1950 and 2017. More than half this plastic has been produced since 2004. In 2020, 400 million tonnes of plastic were produced. If global trends on plastic demand continue, it is estimated that by 2050 annual global plastic production will reach over 1, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Collodion
Collodion is a flammable, syrupy solution of nitrocellulose in ether and alcohol. There are two basic types: flexible and non-flexible. The flexible type is often used as a surgical dressing or to hold dressings in place. When painted on the skin, collodion dries to form a flexible nitrocellulose film. While it is initially colorless, it discolors over time. Non-flexible collodion is often used in theatrical make-up. Collodion was also the basis of most wet-plate photography until it was superseded by modern gelatin emulsions. History In 1846 Louis-Nicolas Ménard and Florès Domonte discovered that cellulose nitrate could be dissolved in ether. They devised a mixture of ether (ethoxyethane) as the solvent and ethanol as a diluent that rendered cellulose nitrate into a clear gelatinous liquid. Collodion was first used medically as a dressing in 1847 by the Boston physician John Parker Maynard. The solution was dubbed "collodion" (from the Greek κολλώδης (''kollodis''), g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sheaffer
Sheaffer Pen Corporation () is an American manufacturing company of writing instruments, particularly luxury fountain pens. The company was founded by Walter A. Sheaffer in Fort Madison, Iowa, and incorporated in 1913 to exploit his invention of a lever-filling fountain pen. The brand was sold by French company Bic to A. T. Cross Company in August, 2014. In August, 2022 the brand was sold to and is currently owned bWilliam Penn Private Limited a multi-brand retailer and distributor of writing instruments and accessories. History In 1912, Walter A. Sheaffer took his idea of a pen filling apparatus that utilized a lever system and, with his life savings, founded the W. A. Sheaffer Pen Company in Fort Madison, Iowa. The company was established in the back room of Mr. Sheaffer's jewelry store with seven employees, and was incorporated a year later, in 1913. By the 1930s, Sheaffer fountain pens were being advertised as the pen that "fills instantly from any ink-well, with one touc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
