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For [[Weaving|woven]] [[textile]]s, '''grain''' refers to the orientation of the [[Warp and woof|weft and warp]] threads. The three named grains are '''straight grain''', '''cross grain''', and '''the bias''' grain. In sewing, a pattern piece can be cut from fabric in any orientation, and the chosen grain or orientation will affect the way the fabric hangs and stretches and thus the fit of a garment. Generally speaking a piece is said to be cut on a particular grain when the longest part of the pattern or the main seams of the finished piece are aligned with that grain. Non-woven materials such as [[felt]], [[interfacing]] or [[leather]] do not have a grain.

==Straight grain==
The '''straight grain''' is oriented parallel with the warp threads and the [[selvedge]]. The straight grain typically has less stretch than the crossgrain since the warp threads will be pulled tighter than the weft during weaving. Most garments are cut with the straight grain oriented top to bottom.<ref name="threads">Howard, Pamela. "For woven fabrics, it's important to go with the grain". Threads (Taunton Press) April/May 2005.</ref>

==Cross grain==
The '''cross grain''' runs perpendicular to the selvedge and parallel to the weft threads. The cross grain generally has more stretch than the straight grain since the weft threads are generally looser than the warp during weaving. Most garments (like [[Trousers|pants]] or [[shirt]]s) are cut on the straight grain with the cross grain parallel with the floor when the wearer is standing. This allows more stretch through the width of the garment, such as in a pants leg which needs more circumferential than vertical stretch. Garments are sometimes cut on the cross grain, generally because the pieces are too wide to fit on the straight grain.<ref name="threads"/>

==Bias==
[[Image:Bias_(textile).png|right|thumb|200px|"True Bias" of cloth.]]
The '''bias''' grain of a piece of [[Weaving|woven]] [[Textile|fabric]], usually referred to simply as "the bias", is any grain that falls between the straight and cross grains. When the grain is at 45 degrees to its [[Warp (weaving)|warp]] and [[weft]] threads it is referred to as "true bias." Every piece of woven fabric has two biases, [[perpendicular]] to each other. A garment made of woven fabric is said to be "cut on the bias" when the fabric's warp and weft threads are on one of the bias grains.

Woven fabric is more elastic as well as more fluid in the bias direction, compared to the straight and cross grains. This property facilitates [[clothing|garments]] and garment details that require extra elasticity, drapability or flexibility, such as bias-cut skirts and dresses, [[necktie]]s, piping [[trim (sewing)|trims]] and decorations, bound seams, etc.

The "bias-cut" is a technique used by designers for cutting clothing to utilize the greater stretch in the bias or diagonal direction of the fabric, thereby causing it to accentuate body lines and curves and drape softly. For example, a full-skirted dress cut on the bias will hang more gracefully or a narrow dress will cling to the figure. Bias-cut garments were an important feature of the designs of [[Madeleine Vionnet]] in 1920s and 1930s<ref>{{Cite web|url=https://madparis.fr/francais/musees/musee-des-arts-decoratifs/expositions/expositions-terminees/madeleine-vionnet-puriste-de-la/|title=Madeleine Vionnet, puriste de la mode|website=madparis.fr|access-date=2019-07-17}}</ref> and bias-cut styles are revived periodically.<ref>{{Cite web|url=https://www.thenational.ae/lifestyle/deconstructing-bias-cut-dresses-1.729294|title=Deconstructing: bias-cut dresses|website=The National|date=10 May 2018|language=en|access-date=2019-07-17}}</ref> Before her time, bias cut was rare in women's clothing and {{H:title|outré: 1. Beyond what is customary or proper; extravagant. 2. Very unconventional.|outré}} in garments for men, to the extent that the specially-designed clothing of the [[dandy]] and [[celebrity chef]] [[Alexis Soyer]] were remarked on by [[George Augustus Sala]], on meeting Soyer in the [[Hungerford Market]]:<blockquote>"...an extraordinary oddity was added to his appearance by the circumstance that every article of his attire, save, I suppose, his gloves and boots, was cut on what dressmakers call a "bias", or as he himself, when I came to know him well, used to designate as à la zoug-zoug."<ref>Sala 1894, II, 240-241, quoted by [http://www.rc.umd.edu/praxis/gastronomy/garval/garval_essay.html Michael Garval "Romantic Gastronomies: Alexis Soyer and the Rise of the Celebrity Chef"]</ref></blockquote>In the Middle Ages, before the development of knitting, [[hose (clothing)|hose]] were cut on the bias in order to make them fit better. The old spelling was byas, or (less common) byess.<ref>{{Cite web|url=http://www.oed.com/view/Entry/18564?rskey=s3PlHH&result=1&isAdvanced=false#eid|title=Home : Oxford English Dictionary}}</ref>

== See also ==
* [[Bias tape]]

== References ==
{{Reflist}}

{{sewing}}

[[Category:Textiles]]
[[Category:Sewing]]

Grain (textile) - Revision history

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