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What are Warp and Weft?

Mary McMahon
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Updated: May 16, 2024
Views: 159,837
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The terms warp and weft are used in reference to textiles, specifically those that are woven. In the literal sense, they are the technical terms for the two types of thread used to create a finished woven product. The warp is the tightly stretched lengthwise core of a fabric, while the weft is woven between the warp threads to create various patterns. Some people also call the weft the “filler” thread, since it fills in the design, and the archaic “woof” is also used instead of weft in some regions.

In order to weave any kind of textile, the weaver needs to start with the warp threads. Warp threads tend to be stronger and more coarse, because they must be able to withstand tight stretching. They also provide a core of support for the finished piece, giving the textile body and form. The warp is stretched onto a loom before weaving begins, and it may be coiled onto a spool for very long or large projects. This spool is unwound as needed, while the finished weaving on the other side is rolled up to get it out of the way.

The weft threads make up the body of the fabric. They may be one color, or they may be multicolored, creating patterns and forms. Some weavers also like to use different types of material for an assortment of textures. In many cases, the weft threads are attached to a shuttle, which is run back and forth through the warp. On weaving machines, setting up the weft can get rather complex, especially when patterns are being made.

The word for weft comes from an Old English word, wefan, which means “to weave.” Since these threads are the ones that are literally woven in a textile, this origin makes sense. “Warp,” on the other hand, comes from an Old Norse word, varp, which means “the cast of a net.” The warp of a fabric, in other words, acts like a net to capture the weft, holding these threads firmly so that they will not escape, causing the textile to unravel.

Collectively, the warp and weft compose a piece of fabric. The two words together are sometimes used metaphorically to talk about fabric, as in the case of someone saying something like “dancing is the warp and weft of her life.” Weavers learn about this concept first, since no woven fabric can be completed without understanding it. Once the basics of weaving are mastered, the weaver can explore an assortment of ways to modify them, creating unique finished products.

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Mary McMahon
By Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a HomeQuestionsAnswered researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Discussion Comments
By GigaGold — On Jan 09, 2011

Fabric dyes allow for a great variety of colors to be present in our modern clothing. In bygone ages, this was simply not the case, and clothes were difficult to make and had bland coloring.

By hangugeo112 — On Jan 06, 2011

Warp and weft are relics of the days before the Industrial Revolution, where mass textile production reigned supreme. After the advent of such large scale production, the economy began to pick up speed, and classical knitting took backstage as a hobby. Today it is a novelty to have a handwoven article of clothing, and they often go for a good price, as well as being an important source of income for women in some countries.

By anon112635 — On Sep 21, 2010

It would be useful to have some idea of the strength (tensile and tear strengths)the warp and weft count adds to the fabric - in this case plasticised polyester. E.g., what can we conclude if the tensile warp is 2400 and weft 2100 and the tear strength warp is 500 and weft 325. What loads can it take?

Mary McMahon
Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a...

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