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Silk Making In Vietnam Editorial Photo


Silk making in Vietnam Editorial Stock Photo
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Silk making in Vietnam #166755549
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The production of silk is rather sophisticated. It can be briefly described as follows.nnThe first step is to raise silkworms which are fed with mulberry leaves. A Fully grown one are about as long and as thick as a human finger, which grows faster at the properly adjusted temperature. On average, they take twenty-five to thirty days to develop from eggs to the cocoon-spinning stage.nnWhen the cocoons are completed, they are selected, sorted and then sold to come into manufacture. During the production process, the cocoons are heated for killing the silkworms inside and then soaked in hot water to soften silk filament which is then wound onto reels.nnBecause single filaments are so fine, those from five to ten cocoons are wound together by drawing them through a porcelain guide and twisting them into a single fiber, glued together by the melted sericin. The reeled yarn made this way is called raw silk. The more sericin deposited on the filament, the lower the grade of the raw silk. Broken cocoons, partially joined ones, or those spun by two caterpillars together are inferior, and used much like cotton or wool to make spun silk.nnDyes are applied to raw or spun silk, or to woven fabrics after the sericin is removed by boiling. Stronger than any other natural fiber, the delicate look and feel of silk is deceptive. Silk is comfortable in hot weather too, because it absorbs moisture up to 30 percent of its weight without felling wet.

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