Weaving

Weaving
Weaving is a textile craft in which two distinct sets of yarns or threads, called the warp and the filling or weft (older woof), are interlaced to form a fabric or cloth. The warp threads run lengthways on the piece of cloth, and the weft runs across from side to side, across the bolt of cloth.
Cloth is woven on a loom, a device that holds the warp threads in place while filling threads are woven through them. Weft is an old English word meaning "that which is woven".[1]
The way the warp and filling threads interlace with each other is called the weave. The majority of woven products are created with one of three basic weaves: plain weave, satin weave, or twill.
Woven cloth can be plain (in one colour or a simple pattern), or can be woven in decorative or artistic designs, including tapestries. Fabric in which the warp and/or weft is tie-dyed before weaving is called ikat.
The ancient craft of handweaving, along with hand spinning, remains a popular craft. The majority of commercial fabrics in the West are woven on computer-controlled Jacquard looms. In the past, simpler fabrics were woven on dobby looms, while the Jacquard harness adaptation was reserved for more complex patterns. Some believe the efficiency of the Jacquard loom, with its Jacquard weaving process, makes it more economical for mills to use them to weave all of their fabrics, regardless of the complexity of the design.


Process

In general, weaving involves the interlacing of two sets of threads at right angles to each other: the warp and the weft. The warp are held taut and in parallel order, typically by means of a loom, though some forms of weaving may use other methods. The loom is warped (or dressed) with the warp threads passing through heddles on two or more harnesses. The warp threads are moved up or down by the harnesses creating a space called the shed. The weft thread is wound onto spools called bobbins. The bobbins are placed in a shuttle that carries the weft thread through the shed. The raising and lowering sequence of warp threads gives rise to many possible weave structures:
plain weave,
twill weave,
satin weave, and
complex computer-generated interlacings.
Both warp and weft can be visible in the final product. By spacing the warp more closely, it can completely cover the weft that binds it, giving a warpfaced textile such as rep weave. Conversely, if the warp is spread out, the weft can slide down and completely cover the warp, giving a weftfaced textile, such as a tapestry or a Kilim rug. There are a variety of loom styles for hand weaving and tapestry. In tapestry, the image is created by placing weft only in certain warp areas, rather than across the entire warp width.

A Brief History of Weaving

Weaving is the systematic interlacing of two or more sets of elements usually, but not necessarily, at right angles, to form a coherent structure. No one knows when or where the weaving process actually began, but as far back as there are relics of civilized life, it is thought that weaving was a part of developing civilizations. Because of the perishable nature of textile goods, information found about the beginning stages of weaving is sketchy, and tracing the development of textiles is a difficult task and a tremendous challenge. Due to nature's hazards of erosion, climatic conditions, insects, and fire, few examples of early woven fabrics survived. Therefore, much of what is written about primitive weaving is based on speculation. There are, however, certain circumstances under which remnants of fabrics have survived: arid regions, bog lands, sealed tombs, and extremely cold areas. Because of these artifacts, we are fortunate to have some examples of early textiles and weaving tools.

The everyday needs of our prehistoric ancestors probably led them to create objects using fiber as a medium. It is thought that ancient humans instinctively used weaving as an aid in their quest for basic needs of food, shelter, and clothing. It is not unlikely that people might have realized the possibilities of the woven structure after observing spider webs, birds' nests, or the construction of a beaver's dam. These findings probably led to the interlacing of twigs or vines, and resulted in netting which surely assisted humans in catching fish and trapping game. In addition, by using twining or braiding techniques, it is likely that primitive people learned to make mats to cover floors of huts, which helped insulate against dampness or cold. Eventually, people used weaving skills to make exterior coverings for shelters, so they would be somewhat protected from harsh weather and/or from predators.

Archeologists believe that basket making and weaving were probably the first "crafts" developed by humans. Once primitive people learned ways of creating a woven structure, the possibilities were endless: netting, coverings for huts, containers for goods, carriers for the young, rugs, blankets, hammocks, pouches, body coverings. Along with our ancestors' ongoing quest for survival, there is evidence of an unconstrained desire by humans to embellish the objects created. The use of natural dyes on reeds or the combination of varying sizes and colors of weaving elements to create patterns, was likely an an attempt to express individualism and an aesthetic sensibility. Human beings naturally have a strong compulsion to be creative, and our records show that this trait was prevalent in our ancestors' lives thousands of years ago.

Research indicates that cultures on every continent devised crude looms and methods of making webs, and further study tells that us there was great similarity in the looms constructed and in the weavings produced.

The Prehistoric Origins of Weaving

With modern sophisticated methods of radiocarbon testing and DNA testing, today's scientists are much better able to assign accurate dates to archeological findings than they were even a decade ago. The exact date of the first handwoven works, however, continues to remain a mystery. Nevertheless, there is evidence of cloth being made in Mesopotamia and in Turkey as far back as 7000 to 8000 BC.

Since fabric remnants have been difficult to find, to say the least, some historians use other sources as guides in piecing together our textile heritage. One valued artifact is the funerary model of a weaver's workshop, which was found in an Egyptian tomb. This model contains a horizontal loom, warping devices and other tools, and weavers in action. We can also take note of the garments worn by the people.


Another artifact, which is highly valued, is the piece of pottery below with the imprint of a textile structure etched in its exterior. It is believed that an early craftsperson formed this pot by lining the interior of a woven basket with wet clay. Heat was provided to shrink and harden the clay, at which time, the basket fell away leaving its mark on the outside of the pot.

Weaving in Egypt

Sealed tombs in Egypt's Nile Valley have brought forth fabrics dating back as far as 5000 BC. The predominant fiber found in Egypt was linen, a product of the native flax plant. A simple plain-weave pattern, an over-under stitch, was used for the construction of cloth. This plain weave structure was the dominant stitch until about 2500 BC. Wool was accessible in Egypt, as well, but was considered a fiber of the lower classes, namely, herdsmen and farmers.

Wool garments are rarely found in Egyptian tombs. In fact, Egyptian law placed certain restrictions on the use of wool. One such law forbade members of the priesthood to wear wool next to their skin or to wear wool into a place of worship. Cloth make from wool was thought to be crude and irreverent. Fabric made with cotton was much more acceptable and has been found in Egyptian tombs, but cloth made with linen was always considered the highest quality material and was used in mummy wrappings of the aristocracy.

Weaving in Mesopotamia

Mesopotamia, located between the Tigris and Euphrates rivers, became the center for commerce and was known to have textiles of quality. Because of its location, Mesopotamia was a major pathway for trade and for other developing civilizations. Archeologists found Sumerian clay tablets dating back to 2200 BC, which provided evidence of a flourishing weaving industry. The Babylonians followed with weavers who specialized in certain areas of the craft. For example, embroidery became such an important textile art form to this culture that the technique came to be known as "Babylonian".

Weaving among the ancient Hebrews

Ancient fabrics from the Hebrew world date back as early as 3000 BC. Many of the yarns produced by the Hebrews were multi-plied, up to 72 ply, and the Bible indicates that some garments contained threads made of gold and silver. Wool was used more than any other fiber in this area, white wool being the finest. Course wool, black wool, and horsehair were considered secondary. Hebrew priests were required to wear pure linen. In the Old Testament (Deuteronomy 22:11), we are given detailed information about the practices of early Hebrew weaving. One law stated that it was prohibitive to wear fabrics made from a mixture of linen and wool fibers. Another Hebrew law forbade married women to spin yarn in public places or to spin yarn at night by moonlight. Because of the active nature of the spinning process, such an act might reveal a woman's arms, and if this were to occur, it would give a husband the right to divorce his wife.

Weaving in China

One of the most fascinating stories in the development of weaving comes from China. Several legends have been told about the discovery of silk, but there is one that has become the most noted of all. In the 27th century B.C.E., during the reign of Emperor Huang-Ti, a disease began to destroy the trees in the royal mulberry grove, so the emperor asked his empress to study the problem. Empress Hsi-Ling-shi spent time in the groves and noticed that small white worms were devouring the mulberry leaves. The worms then would crawl to the naked stems below where they would spin silvery, white cocoons. According to legend, Empress His-Ling-shi took some of the small cocoons to her apartment for closer observation, and there one of the cocoons accidentally fell into a bath of warm water. As water was absorbed into the cocoon, the tiny pocket began to unravel revealing a delicate network of fibers. The empress pulled a small filament from the network and realized the fiber was a continuous thread, hundreds of feet long. In fact, one cocoon can contain a single filament measuring over 1,000 yards. With the discovery of the silk fiber, His-Ling-shi found the secret of acquiring a very rare and exquisite thread, one that could be used without first going through the spinning process.

As weavers in China began using silk in many of their elegant garments and tapestries, and later, as fabrics began to be exported, people outside of China became envious and somewhat resentful of the discovery. Despite the interest and curiosity of others, the process of cultivating silk remained a mystery and a well-kept secret to the outside world for over 3000 years.

Weaving in Switzerland

Another area where artifacts of prehistoric weaving were found was the region of the Swiss Lake Dwellers, a culture dating back to about 5000 B.C.E. Here archeologists discovered woven linen scraps and spinning whorls, an indication that this culture had advanced knowledge of the subject.

Weaving in Peru

We are fortunate to have examples of early Peruvian textiles and weaving tools. Most of the relics, which date back to 5800 B.C.E., were found in burial sites. Tools were simple, but weavings show a great variety of techniques, including tapestry, embroidery, and pile weaves. Cotton was grown along the coast and was the predominant fiber used in the lower elevations. In the mountainous areas, the Peruvians raised sheep and llama for wool and alpaca.

The Development of the Loom

Webster defines a loom as "a frame or machine for interweaving yarn or threads into a fabric, the operation being performed by laying lengthwise a series called the warp and weaving in across this other threads called the weft, woof, or filling." Another definition, which is quite to the point: "A loom is the framework across which threads are stretched for the weaving of cloth." Since the warp functions as the backbone of the weaving structure, choosing a warp requires knowledge of the nature of fibers, in that warp yarns workbest if they have certain characteristics. The warps should be fairly smooth and should not have too many slubs or bumps. The warps should be plied yarns with adequate tensile strength, strong enough to withstand a certain amount of weight. Types of warp yarns used in historic times varied depending upon what plants or animals were native to a particular region. Cotton, wool, linen, and silk were favorite warp yarns of our ancestors and are still some of the most popular choices of contemporary weavers. Today's fiber artists use the same general principles as people during primitive times, for the fundamental aspects of handweaving have remained unchanged. Since many loom types have evolved over the centuries, we will discuss a selection of looms, starting with the simple and progressing to the more complex.

Warp-weighted Loom

It is thought that the first looms, called warp-weighted looms, were vertical structures. The weaver would suspend fibers from a tree branch, which was parallel to the ground, or he might fashion a vertical loom using tree limbs and branches. Below is an image of a warp-weighted loom depicted on a terra cotta Greek vase. The picture gives us clear information about early loom construction, tools used, and weaving processes.

Warp ends were tied over the top branch and were then placed under tension with stones or weights made of baked clay. Initially, weaving was accomplished by walking back and forth in front of the loom, lifting one warp thread at a time, and passing the weft under and over the warps from side-to-side. Working against gravity, wefts were pushed up into place with the weaver's hands or with a crude comb. Since every warp thread had to be lifted by hand, the process was slow and tedious. In time, a large tapered stick was introduced and was used to carry the weft across the warp and to push, or beat, the threads up into place. Early on, this stick resembled an over-sized needle, but ultimately, it became the shuttle, a tapered device on which weft yarn is wound and which passes between warp threads.

One of the most useful discoveries during the evolution of weaving was the realization of the shed, an opening in the warp through which the weft thread travels, resulting in a web. Initially, weavers had to raise every warp thread by hand and then pass the weft thread through bit by bit, but in time, weavers found ways to create sheds. One such way involved the insertion of a rod under every other warp thread. The rod, called the shed stick, could then be lifted or turned on its side, revealing a clear passage for the weft. The creation of the shed hastened weaving time, but the weaver still had to continually use one hand to hold up the rod in order to pass the shuttle through the shed.

Horizontal Ground Loom

The horizontal ground loom, probably a spin-off of the warp-weighted loom, was another primitive weaving tool. Equally spaced sticks or pegs were driven fairly deep into the ground in two parallel lines. The lines were spaced several feet apart, depending upon the desired length of the fabric to be made. The distance between the pegs varied according to the type of weaving desired, and the width of the two rows also played a part in the size of the fabric. Winding the warp began by tying the warp yarn onto the outside peg in one row and then crossing over to and wrapping around the corresponding peg in the opposite row, and then back to row one, peg two, and so on. Constant tension in winding the warp was imperative for a successful weaving. Using a shed stick and one or more shuttles, the weaver would bend over the tensioned warp and weave from the one end to the other.

Pit Loom

Since the horizontal ground loom required the weaver to lean over to accomplish his task, this made for a very uncomfortable exercise. Eventually, the ground loom evolved into the pit loom, so named because the loom was placed over a pit which was dug into the ground. The weaver could now sit comfortably on the edge of the pit with legs dangling in the hole and be on the same plane as the loom. Click here to view a drawing of a pit loom.

Frame Loom

With the development of the frame loom, the weaver was had a portable tool, one that was easily constructed and could be used almost anywhere. The loom was built using four sticks, attached at right angles, making it necessary for opposite sides to be equal lengths. The warp was wound by tying a warp thread to the top stick and moving down to the bottom stick, wrapping around it, and moving back to the top, and repeating this process until the desired width was achieved. The weaving could be done by holding the loom in one's lap or by placing the loom on a table. A shed stick could be installed to lift warps as needed. Click here to view a twentieth-century example of a frame loom.

Backstrap Loom

Eventually the backstrap loom was developed, and not only was it easy to transport, it was simple to construct. One end of the loom was attached to a fixed point, like a tree trunk, and the other was attached to a rod, which was held in place with a cord that passed around the waist of the weaver. By leaning back against the waist cord, the weaver could put tension on the warp threads and adjust tautness at will. Click here to view a diagram of a backstrap loom.

Not only could the loom have shed sticks, it could also be fashioned with the slot-and-eye heddle system, a significant step in loom evolution. This tool not only gives two clear sheds, it also acts as the beater, pushing weft threads into place. Clearly, the heddle system was used on looms types other than the backstrap, but once again, we have no way of knowing exactly when this tool was used for the first time.

The backstrap loom is still used today by Native Americans in the southwestern part of the United States and by people in Central America and Mexico. The loom is limited in complexity only by the skill of the weaver, and the entire loom with the weaving in progress can be rolled up at any time and carried from place to place.


Foot-treadle Loom or Floor Loom


The foot-treadle loom came about after many years of development and exploration. This loom employed a pulley and lever system and the slot-and-eye heddle system giving a clear shed and freeing up the weaver's hands. Generally, weavers today prefer floor looms containing foot treadles, which can rise and lower warp threads at will. With the creation of the floor loom, the shuttle carrying the weft threads could now be passed back and forth across the warp without interruption.


Computer-driven Loom

Contemporary looms include several different types of floor looms, but the most progressive to date is the computerized loom for the individual weaver. A great deal of the weaving process involves numbers: thread count, length and width dimensions, harnesses used, numbers of treadles used, sequence repetition to create patterns, and so on. A loom is naturally a mathematical instrument, so it can easily be coupled with our world of computer-driven technology. Looms fashioned with computer systems can offer today's weavers limitless possibilities of techniques.

Summary

The journey through the history of weaving from the discovery of the warp-weighted loom to the present computer-driven loom is an interesting one. The world's civilizations have progressively developed the tools used in weaving from the tree-branch loom to machine driven multi-harnessed devices, and yet, the essence of the weaving process remains exactly the same, a very humbling and comforting thought.

Weaving has also served as a powerful metaphor for life in the art, literature, and mythology of many cultures