Linen

The discovery of dyed flax fibers in a cave in Southern Caucasus, West Asia (modern day country, Georgia) dated to 36,000 years ago suggests that ancient people used wild flax fibers to create linen-like fabrics from an early date.[10][11]

Fragments of straw, seeds, fibers, yarns, and various types of fabrics, including linen samples, dating to about 8,000 BC have been found in Swiss lake dwellings.[12]

Woven flax textile fragments have been "found between infant and child" in a burial at Çatalhöyük, a large settlement dating to around 7,000 BC.[13] To the southeast, in ancient Mesopotamia, flax was domesticated and linen was produced.[14] It was used mainly by the wealthier class of the society, including priests.[15] The Sumerian poem of the courtship of Inanna mentions flax and linen.[16]

In ancient Egypt, linen was used for mummification and for burial shrouds. It was also worn as clothing on a daily basis; white linen was worn because of the extreme heat. For example, the Tarkhan dress, considered to be among the oldest woven garments in the world and dated to between 3482 and 3102 BC, is made of linen.[17] Plutarch wrote that the priests of Isis also wore linen because of its purity.[18][19] Linen was sometimes used as a form of currency in ancient Egypt. Egyptian mummies were wrapped in linen as a symbol of light and purity, and as a display of wealth. Some of these fabrics, woven from hand-spun yarns, were very fine for their day, but are coarse compared with modern linen.[20] When the tomb of the Pharaoh Ramses II, who died in 1213 BC, was discovered in 1881, the linen wrappings were in a state of perfect preservation after more than 3000 years. In the Ulster Museum, Belfast there is the mummy of 'Takabuti' the daughter of a priest of Amun, who died 2,500 years ago.[21] The linen on this mummy is also in a perfect state of preservation.

Diocletian's 4th century maximum prices edict showing prices for 3 grades of linen across the Roman Empire

The earliest written documentation of a linen industry comes from the Linear B tablets of Pylos, Greece, where linen is depicted as an ideogram and also written as "li-no" (Greek: λίνον, linon), and the female linen workers are cataloged as "li-ne-ya" (λίνεια, lineia).[22][23]

Ancient Coptic material

By the Middle Ages, there was a thriving trade in German flax and linen. The trade spread throughout Germany by the 9th century and spread to Flanders and Brabant by the 11th century. The Lower Rhine was a center of linen making in the Middle Ages.[24] Flax was cultivated and linen used for clothing in Ireland by the 11th century.[25] Evidence suggests that flax may have been grown and sold in Southern England in the 12th and 13th centuries.[26]

Textiles, primarily linen and wool, were produced in decentralized home weaving mills.[27]

Linen continued to be valued for garments in the 16th century[28] and beyond. Specimens of linen garments worn by historical figures have survived. For example, a linen cap worn by Emperor Charles V was carefully preserved after his death in 1558.[28]

There is a long history of the production of linen in Ireland. When the Edict of Nantes was revoked in 1685, many of the Huguenots who fled France settled in the British Isles and elsewhere. They brought improved methods for linen production with them, contributing to the growth of the linen industry in Ireland in particular.[29] Among them was Louis Crommelin, a leader who was appointed overseer of the royal linen manufacture of Ireland. He settled in the town of Lisburn near Belfast, which is itself perhaps the most famous linen producing center throughout history; during the Victorian era the majority of the world's linen was produced in the city, which gained it the name Linenopolis.[30] Although the linen industry was already established in Ulster, Louis Crommelin found scope for improvement in weaving, and his efforts were so successful that he was appointed by the Government to develop the industry over a much wider range than the small confines of Lisburn and its surroundings. The direct result of his good work was the establishment, under statute, of the Board of Trustees of the Linen Manufacturers of Ireland in the year 1711. Several grades were produced including coarse lockram. The Living Linen Project was set up in 1995 as an oral archive of the knowledge of the Irish linen industry, which was at that time still available within a nucleus of people who formerly worked in the industry in Ulster.

The linen industry was increasingly critical in the economies of Europe[31][32] in the 18th and 19th centuries. In England and then in Germany, industrialization and machine production replaced manual work and production moved from the home to new factories.[27]

Linen was also an important product in the American colonies, where it was brought over with the first settlers and became the most commonly used fabric and a valuable asset for colonial households.[33] The homespun movement encouraged the use of flax to make home spun textiles.[34] Through the 1830s, most farmers in the northern United States continued to grow flax for linen to be used for the family's clothing.[35]

In the late 19th and early 20th centuries, linen was very significant to Russia and its economy. At one time it was the country's greatest export item and Russia produced about 80% of the world's fiber flax crop.[12]

In December 2006, the General Assembly of the United Nations proclaimed 2009 to be the International Year of Natural Fibres in order to raise people's awareness of linen and other natural fibers.[1]

One study suggests that the functional properties of linen fabric can be improved by incorporating chitosan-citric acid and phytic acid thiourea. The effects of this process include improved levels of antibacterial activity, increased wrinkle resistance, flame retardancy, UV protection, and antioxidant properties. Additionally, the linen fabric was able to retain durability for about 20 washes.[36]

There are many references to linen throughout the Bible, reflecting the textile's entrenched presence in human cultures.[37]

In Judaism, the only law concerning which fabrics may be interwoven together in clothing concerns the mixture of linen and wool, called shaatnez; it is restricted in Deuteronomy 22:11 "Thou shalt not wear a mingled stuff, wool and linen together" and Leviticus 19:19, "...neither shall there come upon thee a garment of two kinds of stuff mingled together." There is no explanation for this in the Torah itself and it is categorized as a type of law known as chukim, a statute beyond man's ability to comprehend.[38] First-century Romano-Jewish historian Josephus suggested that the reason for the prohibition was to keep the laity from wearing the official garb of the priests,[39][40] while medieval Sephardic Jewish philosopher Maimonides thought that the reason was that heathen priests wore such mixed garments.[41] Others explain that it is because God often forbids mixtures of disparate kinds, not designed by God to be compatible in a certain way, with mixing animal and vegetable fibers being similar to having two different types of plowing animals yoked together; also, such commands serve both a practical as well as allegorical purpose, perhaps here preventing a priestly garment that would cause discomfort (or excessive sweat) in a hot climate.[42]

Linen is also mentioned in the Bible in Proverbs 31, a passage describing a noble wife. Proverbs 31:22 says, "She makes coverings for her bed; she is clothed in fine linen and purple." Fine white linen is also worn by angels in the New Testament (Revelation 15:6).

Flax stem cross-section, showing locations of underlying tissues. Ep = epidermis; C = cortex; BF = bast fibres; P = phloem; X = xylem; Pi = pith

Linen is a bast fiber. Flax fibers vary in length from about 25 to 150 mm (1 to 6 in) and average 12–16 micrometers in diameter. There are two varieties: shorter tow fibers used for coarser fabrics and longer line fibers used for finer fabrics. Flax fibers can usually be identified by their “nodes” which add to the flexibility and texture of the fabric.

The cross-section of the linen fiber is made up of irregular polygonal shapes which contribute to the coarse texture of the fabric.[50]

Linen fabric feels cool to touch, a phenomenon which indicates its higher conductivity (the same principle that makes metals feel "cold"). It is smooth, making the finished fabric lint-free, and gets softer the more it is washed. However, constant creasing in the same place in sharp folds will tend to break the linen threads. This wear can show up in collars, hems, and any area that is iron creased during laundering. Linen's poor elasticity means that it easily wrinkles.

Mildew, perspiration, and bleach can damage the fabric, but because it is not made from animal fibers (keratin) it is impervious to clothes moths and carpet beetles. Linen is relatively easy to take care of, since it resists dirt and stains, has no lint or pilling tendency, and can be dry-cleaned, machine-washed, or steamed. It can withstand high temperatures, and has only moderate initial shrinkage.[50]

Linen should not be dried too much by tumble drying, and it is much easier to iron when damp. Linen wrinkles very easily, and thus some more formal garments require ironing often, in order to maintain perfect smoothness. Nevertheless, the tendency to wrinkle is often considered part of linen's particular "charm", and many modern linen garments are designed to be air-dried on a good clothes hanger and worn without the necessity of ironing.

A characteristic often associated with linen yarn is the presence of slubs, or small, soft, irregular lumps, which occur randomly along its length. In the past, slubs were traditionally considered to be defects, and were associated with low-quality linen. However, in the case of many present-day linen fabrics, particularly in the decorative furnishing industry, slubs are considered as part of the aesthetic appeal of an expensive natural product. In addition, slubs do not compromise the integrity of the fabric, and therefore they are not viewed as a defect. However, the very finest linen has very consistent diameter threads, with no slubs at all.

Linen can degrade in a few weeks when buried in soil. Linen is more biodegradable than cotton, making it an eco friendly fiber.[51]

The standard measure of bulk linen yarn is the "lea", which is the number of yards in a pound of linen divided by 300. For example, a yarn having a size of 1 lea will give 300 yards per pound. The fine yarns used in handkerchiefs, etc. might be 40 lea, and give 40x300 = 12,000 yards per pound. This is a specific length therefore an indirect measurement of the fineness of the linen, i.e., the number of length units per unit mass. The symbol is NeL. The metric unit, Nm, is more commonly used in continental Europe. This is the number of 1,000 m lengths per kilogram. In China, the English Cotton system unit, NeC, is common. This is the number of 840 yard lengths in a pound.

Linen is laborious to manufacture.[52]

Details of the flax plant, from which linen fibers are derived

Mechanical baling of flax in Belgium. On the left side, cut flax is waiting to be baled.

The quality of the finished linen product is often dependent upon growing conditions and harvesting techniques. To generate the longest possible fibers, flax is either hand-harvested by pulling up the entire plant or stalks are cut very close to the root. After harvesting, the plants are dried, and then the seeds are removed through a mechanized process called “rippling” (threshing) and winnowing.

The fibers must then be loosened from the stalk. This is achieved through retting. This is a process which uses bacteria to decompose the pectin that binds the fibers together. Natural retting methods take place in tanks and pools, or directly in the fields. There are also chemical retting methods; these are faster, but are typically more harmful to the environment and to the fibers themselves.

After retting, the stalks are ready for scutching, which takes place between August and December. Scutching removes the woody portion of the stalks by crushing them between two metal rollers, so that the parts of the stalk can be separated. The fibers are removed and the other parts such as linseed, shives, and tow are set aside for other uses. Next the fibers are heckled: the short fibers are separated with heckling combs by 'combing' them away, to leave behind only the long, soft flax fibers.

After the fibers have been separated and processed, they are typically spun into yarns and woven or knit into linen textiles. These textiles can then be bleached, dyed, printed on, or finished with a number of treatments or coatings.[50]

An alternate production method is known as “cottonizing” which is quicker and requires less equipment. The flax stalks are processed using traditional cotton machinery; however, the finished fibers often lose the characteristic linen look.

Flax is grown in many parts of the world, but top quality flax is primarily grown in Western European countries and Ukraine. In recent years bulk linen production has moved to Eastern Europe and China, but high-quality fabrics are still confined to niche producers in Ireland, Italy and Belgium, and also in countries including Poland, Austria, France, Germany, Sweden, Denmark, Belarus, Lithuania, Latvia, the Netherlands, Spain, Switzerland, Britain and Kochi in India. High-quality linen fabrics are now produced in the United States for the upholstery market and in Belgium.

In 2018, according to the United Nations' repository of official international trade statistics, China was the top exporter of woven linen fabrics by trade value, with a reported $732.3 million in exports; Italy ($173.0 million), Belgium ($68.9 million) and the United Kingdom ($51.7 million) were also major exporters.[53]