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작성자 Carmelo
댓글 0건 조회 173회 작성일 24-06-20 01:41

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In his From the Earth to the Moon, guncotton was used to launch a projectile into space. As a projectile driver, it had around six times the gas generation of an equal volume of black powder and produced less smoke and less heating. For this reason, immersing burning film in water may not extinguish it, and could actually increase the amount of smoke produced. By coincidence, a third chemist, the Brunswick professor F. J. Otto had also produced guncotton in 1846 and was the first to publish the process, much to the disappointment of Schönbein and Böttger. The British chemist Frederick Augustus Abel developed the first safe process for guncotton manufacture, which he patented in 1865. The washing and drying times of the nitrocellulose were both extended to 48 hours and repeated eight times over. He referred to the substance several times in his novels. His adventurers carried firearms employing this substance. More-stable and slower-burning collodion mixtures were eventually prepared using less concentrated acids at lower temperatures for smokeless powder in firearms. In the meantime, George Eastman had already started production of roll-film using his own process. Nitrocellulose was used as the first flexible film base, beginning with Eastman Kodak products in August 1889. Camphor is used as a plasticizer for nitrocellulose film, often called nitrate film.


Goodwin's patent was sold to Ansco, which successfully sued Eastman Kodak for infringement of the patent and was awarded $5,000,000 in 1914 to Goodwin Film. During the year 1914-the same year that Goodwin Film was awarded $5,000,000 from Kodak for patent infringement-nitrate film fires incinerated a significant portion of the United States' early cinematic history. Schönbein collaborated with the Frankfurt professor Rudolf Christian Böttger, who had discovered the process independently in the same year. Later that same month, many more reels and film cans of negatives and prints also burned at Edison Studios in New York City, in the Bronx; then again, on May 13, a fire at Universal Pictures' Colonial Hall "film factory" in Manhattan consumed another extensive collection. Owing to public safety precautions, London Underground forbade transport of movies on its system until well past the introduction of safety film. Cinema fires caused by the ignition of nitrocellulose film stock commonly occurred as well.


The use of volatile nitrocellulose film for motion pictures led many cinemas to fireproof their projection rooms with wall coverings made of asbestos. Disastrous fires related to celluloid or "nitrate film" became regular occurrences in the motion picture industry throughout the silent era and for many years after the arrival of sound film. In 1868, American inventor John Wesley Hyatt developed a plastic material he named Celluloid, improving on Parkes' invention by plasticizing the nitrocellulose with camphor so that it could be processed into a photographic film. Safe and sustained production of guncotton began at the Waltham Abbey Royal Gunpowder Mills in the 1860s, and the material rapidly became the dominant explosive, becoming the standard for military warheads, although it remained too potent to be used as a propellant. The patent rights for the manufacture of guncotton were obtained by John Hall & Son in 1846, and industrial manufacture of the explosive began at a purpose-built factory at Marsh Works in Faversham, Kent, a year later. While guncotton is dangerous to store, the hazards it presents can be minimized by storing it dampened with various liquids, such as alcohol. There are many examples of how this can be achieved. Because of their fluffy and nearly white appearance, nitrocellulose products are often referred to as cottons, e.g. lacquer cotton, celluloid cotton, and gun cotton.


Carom games such as straight-rail, three-cushion, balkline, and five pins make use of only three balls: a red object ball, one solid white cue ball for player one, and another cue ball that is white with a dot on it, or yellow, for player two. The method was to immerse one part of fine cotton in 15 parts of an equal blend of sulfuric acid and nitric acid. His preparation method was the first to be widely used. The very first place folks frequently appear to cut corners is on the cue itself. If the shooter doesn’t have any object balls on the opposite side of the head string, he or she must bounce the cue ball off of one or more cushions at the opposite end of the table before it’s able to legally contact an object ball in the kitchen. Professional tournament rules vary on the use of the kitchen when a scratch occurs. Guncotton was originally made from cotton (as the source of cellulose) but contemporary methods use highly processed cellulose from wood pulp.



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