yarn. Friday , March 16th , 2018 - 02:07:36 AM
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.
The most commonly spun animal fiber is wool harvested from sheep. For hand knitting and hobby knitting thick wool and acrylic yarns are frequently used.
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.
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