chloe. yarn. May 29th , 2018.
Protein yarns (i.e. hair silk feathers) may also be irritating to some people causing contact dermatitis hives wheezing or other reactions. Plant fibers tend to be better tolerated by people with sensitivities to the protein yarns and allergists may suggest using them or synthetics instead to prevent symptoms. Some people find that they can tolerate organically grown and processed versions of protein fibers possibly because organic processing standards preclude the use of chemicals that may irritate the skin.
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.
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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