yarn. Friday , March 16th , 2018 - 02:06:54 AM
When natural hair-type fibers are burned they tend to singe and have a smell of burnt hair; this is because many as human hair are protein-derived. Cotton and viscose (rayon) yarns burn as a wick. Synthetic yarns generally tend to melt though some synthetics are inherently flame-retardant. Noting how an unidentified fiber strand burns and smells can assist in determining if it is natural or synthetic and what the fiber content is.
There are several thicknesses of craft yarn also referred to as weight. This is not to be confused with the measurement and/or weight listed above. The Craft Yarn Council of America is making an effort to promote a standardized industry system for measuring this numbering the weights from (finest) to 6 (heaviest). Some of the names for the various weights of yarn from finest to thickest are called lace fingering sport double-knit (or DK) worsted aran (or heavy worsted) bulky and super-bulky. This naming convention is more descriptive than precise; fibre artists disagree about where on the continuum each lies and the precise relationships between the sizes.
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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