yarn. Friday , March 16th , 2018 - 02:33:26 AM
Spun yarn is made by twisting staple fibres together to make a cohesive thread or "single."6 Twisting fibres into yarn in the process called spinning can be dated back to the Upper Paleolithic and yarn spinning was one of the very first processes to be industrialized. Spun yarns may contain a single type of fibre or be a blend of various types. Combining synthetic fibres (which can have high strength lustre and fire retardant qualities) with natural fibres (which have good water absorbency and skin comforting qualities) is very common. The most widely used blends are cotton-polyester and wool-acrylic fibre blends. Blends of different natural fibres are common too especially with more expensive fibres such as alpaca angora and cashmere.
Other natural fibers that can be used for yarn include linen and cotton. These tend to be much less elastic and retain less warmth than the animal-hair yarns though they can be stronger in some cases. The finished product will also look rather different from the woollen yarns. Other plant fibers which can be spun include bamboo hemp corn nettle and soy fiber.
Another measurement of yarn weight often used by weavers is wraps per inch (WPI). The yarn is wrapped snugly around a ruler and the number of wraps that fit in an inch are counted.
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