yarn. Friday , March 16th , 2018 - 02:19:40 AM
Cotton and polyester are the most commonly spun fibers in the world. Cotton is grown throughout the world harvested ginned and prepared for yarn spinning. Polyester is extruded from polymers derived from natural gas and oil. Synthetic fibers are generally extruded in continuous strands of gel-state materials. These strands are drawn (stretched) annealed (hardened) and cured to obtain properties desirable for later processing.
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.
Yarn quantities for handcrafts are usually measured and sold by weight in ounces or grams. Common sizes include 25 g 50 g and 00 g skeins. Some companies also primarily measure in ounces with common sizes being three-ounce four-ounce six-ounce and eight-ounce skeins. Textile measurements are taken at a standard temperature and humidity because fibers can absorb moisture from the air. The actual length of the yarn contained in a ball or skein can vary due to the inherent heaviness of the fibre and the thickness of the strand; for instance a 50 g skein of lace weight mohair may contain several hundred metres while a 50 g skein of bulky wool may contain only 60 metres.
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