Yarn
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2008-07-13T20:00:46Z
Shinpah1
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Reverted edits by [[Special:Contributions/92.20.20.156|92.20.20.156]] to last version by 189.21.108.181 (using [[WP:HG|Huggle]])
:''This article is about the fiber product. For the type of joke, see [[Shaggy dog story]].''
[[Image:A basket of yarn.jpg|thumb|right|Yarn]]
<!-- Image with unknown copyright status removed: [[Image:Yarn2.JPG|thumb|Yarn]] -->
[[Image:SpoolsOfThread.jpg|thumb|right|Spools of thread]]
'''Yarn''' is a long continuous length of interlocked [[fiber]]s, suitable for use in the production of [[textile]]s, [[sewing]], [[crochet]]ing, [[knitting]], [[weaving]], [[embroidery]] and [[rope]]making. '''Thread''' is a type of yarn intended for sewing by hand or [[sewing machine|machine]]. Modern manufactured sewing threads may be finished with [[wax]] or other lubricants to withstand the stresses involved in sewing.<ref>Kadolph, Sara J., ed.: ''Textiles'', 10th edition, Pearson/Prentice-Hall, 2007, ISBN 0-13-118769-4, p. 203</ref> [[Embroidery thread]]s are yarns specifically designed for hand or [[machine embroidery]].
==Structure==
:''See main article'' [[Spinning (textiles)]]
[[Image:Spinning jenny.jpg|thumb|left|A [[Spinning Jenny]], spinning machine which initiated the Industrial Revolution]]
[[Image:Yarn twist.png|thumb|right|Z- and S-twist yarn]]
'''Spun yarn''' is made by twisting or otherwise bonding [[staple (textiles)|staple]] [[fiber]]s together to make a cohesive thread.<ref>Kadolph, ''Textiles'', p. 197</ref> Twisting fibers into yarn in the process called [[Spinning (textiles)|spinning]] can be dated back to the [[Upper Paleolithic]]<ref>Barber, Elizabeth Wayland: ''Women's Work:The First 20,000 Years'', W. W. Norton, 1994, p. 44</ref>, and yarn spinning was one of the very first processes to be [[industrialized]]. Spun yarns may contain a single type of fiber, or be a blend of various types. Combining [[synthetic fibers]] (which have high strength, artificial lustre, and fire retardant qualities) with natural fibers (which have good water absorbance and skin comforting qualities) is very common. The most widely used blends are [[cotton]]-[[polyester]] and [[wool]]-[[acrylic fiber]] blends. Blends of different [[natural]] fibers are common too, especially with more expensive fibers such as [[angora wool|angora]] and [[Cashmere wool|cashmere]].
Yarns are made up of a number of plies, each [[plying|ply]] being a single spun yarn. These single plies of yarn are twisted in the opposite direction (plied) together to make a thicker yarn. Depending on the direction of this final twist, the yarn will be known as ''s-twist'' or ''z-twist''. For a single ply, the direction of the final twist is the same as its original twist.
'''Filament yarn''' consists of filament fibers twisted together. Thicker [[monofilament line|monofilament]]s are typically used for industrial purposes rather than fabric production or decoration. [[Silk]] is a natural filament, and synthetic filament yarns are used to produce silk-like effects.
'''Texturized yarns''' are made by a process of air texturizing (sometimes referred to as ''[[taslanizing]]''), which combines multiple filament yarns into a yarn with some of the characteristics of spun yarns.
==Measurement==
===Craft yarns===
[[Image:Catyarn.jpg|thumb|right|300px|[[Cat]] with a ball of blue yarn.]]
Yarn quantities are usually measured by weight in ounces or grams. In the United States, Canada and Europe, balls of yarn for handcrafts are sold by weight. Common sizes include 25g, 50g, and 100g [[skein]]s. Some companies also primarily measure in ounces with common sizes being three-[[ounce]], four-ounce, six-ounce, and eight-ounce skeins. These measurements are taken at a standard temperature and humidity, because yarn 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 fiber and the thickness of the strand; for instance, a 50 g skein of lace weight mohair may contain several hundred meters, while a 50 g skein of bulky wool may contain only 60 meters.
There are several thicknesses of yarn, also referred to as weight. This is not to be confused with the measurement of 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 1 (finest) to 6 (heaviest)<ref>[http://www.yarnstandards.com/weight.html Standards & Guidelines for Crochet & KNitting<!-- Bot generated title -->]</ref>. Some of the names for the various weights of yarn from finest to thickest are called lace, fingering, sock, sport, double-knit (or DK), worsted, aran, bulky, and super-bulky. This naming convention is more descriptive than precise; fiber artists disagree about where on the continuum each lies, and the precise relationships between the sizes.
A more precise 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.
Labels on yarn for handcrafts often include information on [[gauge (knitting)|gauge]], known in the UK as tension, which is a measurement of how many stitches and rows are produced per inch or per centimeter on a specified size of knitting needle or crochet hook. The proposed standardization uses a four-by-four inch/ten-by-ten centimeter knitted or crocheted square, with the resultant number of stitches across and rows high made by the suggested tools on the label to determine the gauge.
In Europe textile engineers often use the unit [[tex (unit)|tex]], which is the weight in grams of a kilometer of yarn, or decitex, which is a finer measurement corresponding to the weight in grams of 10 kilometers of yarn. Many other units have been used over time by different industries.
===Thread===
[[Image:Spool of white thread.jpg|thumb|Spool of all purpose sewing thread, closeup shows texture of 2-ply Z-twist mercerized cotton with polyester core.]]
Most types of embroidery thread come in a single size or weight; an exception is pearl or perle cotton, which comes in three weights, No. 3 (heaviest), No. 5, and No. 8 (finest).<ref>Reader's Digest ''Complete Guide to Needlework''. The Reader's Digest Association, Inc. (March 1992). ISBN 0-89577-059-8, p. 8</ref>
==Color==
[[Image:Conner-prairie-yarn-drying.jpg|thumb|right|Yarn drying after being dyed in the early American tradition, at [[Conner Prairie]] living history museum.]]
[[Image:Selfstripingyarn.JPG|thumb|self-striping yarn]]
Yarn may be used undyed, or may be colored with natural or artificial [[dye]]s. Most yarns have a single uniform hue, but there is also a wide selection of variegated yarns:
* heathered or tweed: yarn with flecks of different colored fiber
* ombre: variegated yarn with light and dark shades of a single hue
* multi-colored: variegated yarn with two or more distinct hues (a "parrot colorway" might have green, yellow and red)
* self-striping: yarn dyed with lengths of color that will automatically create stripes in a knitted or crocheted object
* marled: yarn made from strands of different-colored yarn twisted together, sometimes in closely-related hues
==See also==
{{commons|Yarn}}
* [[Embroidery thread]]
* [[List of novelty yarns]]
* [[Textile manufacturing]]
* [[Electrically conducting yarn]]
* [[Dye lot]]
* [[Crochet thread]]
==Notes==
<references/>
==External links==
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{{textile arts}}
[[Category:Knitting tools and materials]]
[[Category:Crochet]]
[[Category:Sewing]]
[[Category:Weaving]]
[[Category:Fibers]]
[[Category:Textiles]]
[[Category:Yarn]]
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