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Silk throwing
Silk throwing is the industrial process where silk that has been ''reeled'' into skeins, is cleaned, receives a twist and is wound onto bobbins. The yarn is now twisted together with threads, in a process known as ''doubling''. Colloquially silk throwing can be used to refer to the whole process: reeling, throwing and doubling. Silk had to be thrown to make it strong enough to be used as ''organizine'' for the warp in a loom, or ''tram'' for weft.
==History==
Silk weaving is known to have been carried out in Sicily in the tenth century, and in 1474 there were 15,000 employed in the industry in Milan. There is an illustration of a circular handpowered throwing machine drawn in 1487 with 32 spindles. The Italians called the throwing machine, a ''filatoio'', and the doubler, a ''torcitoio''. The first evidence of an externally powered ''filatoio'' comes from the thirteenth century, and the earliest illustration from around 1500. Bologna became the most technological advanced silk throwing town, with ''filatoio'' driven by overhead shafts that were powered by water.〔
In 1704, Thomas Cotchett set up a waterpowered silk throwing mill to produce organizine in Derby. It failed due to the use of the wrong type of machinery. In 1717, John Lombe, visited Piedmont and returned to England with details of the Italian machines, and some Italian craftsmen. He was granted a fourteen-year patent, and built Lombe's Mill in Derby. The King of Sardinia retaliated by prohibiting the export of raw silk. Nevertheless, in 1732 John Guardivaglio set up a silk throwing enterprise at Logwood mill in Stockport, and in 1744, The Button Mill was erected in Macclesfield and in 1753 Old Mill was built in Congleton.〔 These three towns remained the centre of the English Silk Throwing Industry.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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