Harris Tweed is protected by the Harris Tweed Act 1993, which strictly outlines the conditions in which the cloth can genuinely be made.
Originally this handmade fabric was woven by crofters for familial use, ideal for protection against the colder climate of the North of Scotland. Surplus cloth was often traded or used as barter, eventually becoming a form of currency amongst the islanders. For example, it was not unusual for rents to be paid in blankets or lengths of cloth. By the end of the 18th Century, the spinning of wool yarn from local raw materials was a staple industry for crofters. Finished handmade cloth was exported to the Scottish mainland and traded along with other commodities produced by the Islanders, such as dry hides, goat and deer skins.
The original name of the cloth was tweel, Scots for twill, it being woven in a twilled rather than a plain pattern. A traditional story has the name coming about almost by chance. Around 1830, a London merchant received a letter from a Hawick firm about some tweels. The London merchant misinterpreted the handwriting, understanding it to be a trade-name taken from the river Tweed that flows through the Scottish Borders. Subsequently the goods were advertised as Tweed, and the name has remained ever since.
As the Industrial Revolution reached Scotland, mainland manufacturers had turned to mechanization, but the Outer Hebrides retained their traditional processes. Lewis and Harris had long been known for the excellence of the weaving done there, but up to the middle of the nineteenth century, the cloth was produced mainly for home use or for local market.
When Alexander 6th Earl of Dunmore inherited the North Harris Estate from his father in 1836, production of tweed in Outer Hebrides was still entirely manual. Wool was washed in soft, peaty water before being coloured with dyes from local plants and lichens. It was then processed and spun, before being hand woven by the crofters in their cottages. Traditional island tweed was characterized by the flecks of colour achieved through this use of the vegetable dyes, including the lichen dyes called "crottle" (Parmelia saxatilis and Parmelia omphalodes which give deep red- or purple-brown and rusty orange respectively). These lichens are the origin of the distinctive scent of older Harris Tweed.
Upon the death of the 6th Earl of Dunmore in 1843, responsibility for his estate on the Isle of Harris passed to his wife, Lady Catherine Herbert. Lady Catherine noticed the marketing potential and high quality of the tweed cloth produced locally by two sisters from the village of Strond. Known as the Paisley Sisters, after the town where they had trained, the fabric woven by them was of a remarkably higher quality than that produced by untrained crofters. In 1846, the Countess commissioned the sisters to weave lengths of tweed with the Murray family tartan. She sent the finished fabric to be made up into jackets for the gamekeepers and ghillies on her estate. Being hardwearing and water resistant, the new clothing was highly suited to life on the Dunmores' estate. Lady Catherine saw that the jackets worn by her staff could be ideal attire for the outdoor lifestyle that was prevalent amongst her peers.
The Countess began to promote the local textile as a fashionable cloth for hunting and sporting wear. It soon became the fabric of choice for the landed gentry and aristocracy of the time, including members of Queen Victoria’s inner circle. With demand established for this high quality "Harris Tweed", Lady Catherine sent more girls to the Scottish mainland for training. She improved the yarn production process to create a more consistent, workable cloth and by the late 1840s, merchants from Edinburgh to London were supplying the privileged classes with hand-woven Harris Tweed.
From this point on the Harris Tweed industry grew, reaching a peak production figure of 7.6 million yards in 1966.
Harris Tweed Authority
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As the demand for Harris Tweed expanded in the first decade of the 20th century, there was an influx of weavers into the industry seeking a wage and soon a poorer quality tweed was being made by inexperienced weavers from imported, mainland mill-spun yarn gaving rise to the pejorative name of ‘Stornoway Tweed’. This inferior tweed affected the market for traditional Harris Tweed made by experienced weavers from hand-spun yarn.
Legal protection of the name of Harris Tweed by a trade mark and an established standard definition became essential. Groups of merchants in both Lewis and Harris appled to the Board of Trade for a registered trade mark. When this trade mark, the Orb, was eventually granted, the Board insisted that it should be granted to all the islands of the Outer Hebrides i.e. to Lewis, North and South Uist, Benbecula and Barra, as well as to Harris, the rationale for this decision being that the tweed was made in exactly the same way in all those islands.
In 1909, after much negotiation and a degree of acrimony from merchants in Harris who felt that the trade mark should have been granted exclusively to Harris, the Orb Trade Mark was granted. The Harris Tweed Association, a voluntary body, was formed to protect both the use of the Orb Trade Mark and to protect the use of the name ‘Harris Tweed’ from imitations.
The original definition attached to the Orb Trade Mark stated that: Harris Tweed means a tweed, hand-spun, hand-woven and dyed by the crofters and cottars in the Outer Hebrides.
In 1993 new statutory body to guard the Orb Trade Mark, the Harris Tweed Authority, replaced the original Harris Tweed Association. Also in 1993 an Act of Parliament, the Harris Tweed Act 1993, established the Harris Tweed Authority as the successor to the Harris Tweed Association, its purpose being "to promote and maintain the authenticity, standard and reputation of Harris Tweed; for preventing the sale as Harris Tweed of material which does not fall within the definition..."
The following definition of genuine Harris Tweed became statutory: "Harris Tweed means a tweed which has been hand woven by the islanders at their homes in the Outer Hebrides, finished in the islands of Harris, Lewis, North Uist, Benbecula, South Uist and Barra and their several purtenances (The Outer Hebrides) and made from pure virgin wool dyed and spun in the Outer Hebrides"
Today, every 50 metres of Harris Tweed are checked by an inspector from the Harris Tweed Authority before being stamped, by hand, with the Orb Mark.
The Harris Tweed Authority is the legally appointed governing body responsible for upholding the integrity of Harris Tweed in accordance with the Harris Tweed Act of 1993. They are involved in instigating litigation, issuing of the Orb Stamp, inspection of mills and weavers sheds, promotion of the industry and safeguarding Harris Tweed on the behalf of the islanders of the Outer Hebrides. Based in the island capital of Stornoway the Authority consists of a Chief Executive, Secretary and two inspectors and stampers. There is also an overseeing board of unpaid members and a legal team in support.
Harris Tweed mills
There are three mills operating on the islands, each with a public facing company associated with them. The companies handle marketing, sales, customer service and distribution of Harris Tweed to customers while their mills handle certain aspects of the production process.
- Harris Tweed Scotland is owned by Brian Haggas of the John Haggas Group who, after buying the Stornoway based KM Group and mill and set up Harris Tweed Scotland Limited in 2006. The company manufactures Harris Tweed men’s jackets and retail from their online store or from gentleman's retailers. They are the only completely vertical company that manufactures and retails Harris Tweed jackets in this way. Their Stornoway mill is the oldest producer in the Outer Hebrides and has been producing Harris Tweed since 1906.
- The Carloway Mill is an independent wholesale producer of Harris Tweed in the village of Carloway and the smallest of the three existing Harris Tweed textile mills. It uses traditional craft machinery to produce a unique, individualistic and bespoke Harris Tweed cloth. The mill owners announced in January 2016 that they were seeking a buyer for the business and as such the future of the mill is uncertain.
- Harris Tweed Hebrides, who reopened a disused mill in Shawbost in November 2007. The main shareholder in the company is Ian Taylor, a Scottish businessman who has spent the last 30 years in the oil industry with Vitol.
All weavers are self-employed and can work as a 'mill weaver' commissioned by any of the three mills or as an 'independent weaver' making and selling their own cloth, sometimes on private commission. Mill weavers are supplied with beamed warps and yarn directly from the mills along with instructions on how the cloth must be woven. Once the tweed is woven, it is collected by the mill for finishing and stamping, and is then sold by the mill. Independent weavers on the other hand must purchase yarn from the mills and warp it themselves, often to their own design. The independent weaver then sends their woven cloth to the mill for finishing and stamping (which they pay for as a service) before it is returned to the weaver to sell for themselves. A weaver can work both as a mill weaver and an independent weaver.
Harris Tweed Industry Liaison Group meets regularly to discuss issues facing the industry and consists of a range of interested parties such as mill owners, weaver representatives, HTA officials, funding bodies, local council members, buyers and other industry figures.
The creation of Harris Tweed begins with fleeces of pure virgin wools which are sheared from Cheviot and Scottish Blackface sheep. Although most of the wool is grown principally on the Scottish and UK mainland, in the early summer the island communities still join together to round up and shear the local sheep to add to the mix. The two types of wool are blended together to gain the advantages of their unique qualities and characteristics
The freshly dyed coloured and white wools are weighed in predetermined proportions and then thoroughly blended by hand to exact recipes to obtain the correct hue. It is then carded between mechanical, toothed rollers which tease and mix the fibers thoroughly before it is separated into a fragile, embryonic yarn.This soft yarn then has a twist imparted to it as it is spun to give it maximum strength for weaving. The spun yarn is wound onto bobbins to provide the ingredients of weft (left to right threads) and warp (vertical threads) supplied to the weavers.
This vitally important process sees thousands of warp threads gathered in long hanks in very specific order and wound onto large beams ready to be delivered, together with yarn for the weft, to the weavers.
All Harris Tweed is hand woven on a treadle loom at each weaver's home on a 'double-width' Bonas-Griffith rapier loom in the case of mill weavers, or normally an older 'single width' Hattersley loom in the case of independent weavers. The weaver will 'tie in' their warp by threading each end of yarn through the eyelets of their loom's heddles in a specific order then begins to weave, fixing any mistakes or breakages that occur until completed.
The tweed then returns to the mill in its 'greasy state' and here it passes through the hands of darners who correct any flaws.
Once ready the cloth is finished. Dirt, oil and other impurities are removed by washing and beating in soda and soapy water before it is dried, steamed, pressed and cropped.
The final process is the examination by the independent Harris Tweed Authority which visits the mills weekly, before application of their Orb Mark trademark which is ironed on to the fabric as a seal of authenticity.
Harris Tweed today
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In 2012 the weavers and mills of the Harris Tweed industry produced one million metres of Harris Tweed, compared to just 450,000 metres in 2009 and the highest production figures in 17 years. The last three years have seen Harris Tweed remain "on-trend" and a regular feature in both High Street stores and on catwalks in couture collections and the increase in popularity has led to the training of a new generation of weavers to meet production demands.
Menswear brands such as Topman, Barutti  Brooks Brothers, Nordstrom, Thomas Pink, J. Crew  Nigel Cabourn, Hugo Boss, Paul Smith and Prince of Scots continue to explore the fabric's use in jackets, outerwear and suiting.
Footwear brands have also used Harris Tweed, most notably Nike, Dr Martens, Aigle, Red Wing Shoes, and Clarks. The luxury interiors market is also expanding following the use of over 90,000 meters of Harris Tweed in Glasgow's 5 Star Blythswood Square Hotel in 2008.
New markets are emerging within the BRIC nations  and more traditional markets are reviving in the USA  and Europe as well as Far East countries including South Korea. The outlook remains cautious but positive with the sales forecasts looking optimistic for this historic cloth.
- Catherine Murray, Countess of Dunmore
- Traditional dyes of the Scottish Highlands
- Tweed (cloth)
- "Harris Tweed Act 1993 (c. xi)". Legislation.gov.uk. 2011-07-04. Retrieved 2015-08-01.
- Dunbar cites Scots philologist W. F. H. Nicolaisen's suggestion that this "too plausible" explanation may be folk etymology, noting a use of "twedlyne" in 1541, and suggesting "tweedling" in parallel to "twilling" as the origin of "tweed"; see John Telfer Dunbar, The Costume of Scotland, p. 150.
- Fraser, Jean: Traditional Scottish Dyes, Canongate, 1983
- J.C.T. Uphof, Dictionary of Economic Plants, Hafner, New York, p. 210, cited at Bibliographical database of the human uses of lichens retrieved 20 May 2007
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-  Archived June 22, 2012, at the Wayback Machine.
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- "10engines: thomas pink x harris tweed". 10engines.blogspot.co.uk. 2010-12-16. Retrieved 2015-08-01.
- "Harris Tweed sportcoat in Ludlow fit : Ludlow sportcoats". J.Crew. Retrieved 2015-08-01.
- "Nigel Cabourn Authentic Autumn/Winter 2012 collection | Lineage of influence". Lineageofinfluence.wordpress.com. 2012-08-16. Retrieved 2015-08-01.
- Cramb, Auslan (2004-06-21). "Nike's Harris tweed shoes give island weavers a lift". London: Telegraph. Retrieved 2015-08-01.
- Carvell, Nick (2012-10-29). "Dr Martens blue Harris Tweed Beckett boots - GQ.co.uk". Gq-magazine.co.uk. Retrieved 2015-08-01.
-  Archived February 2, 2013, at the Wayback Machine.
-  Archived December 14, 2012, at the Wayback Machine.
- "The Clarks Sale Is Now On!". Clarks.co.uk. Archived from the original on 2 July 2014. Retrieved 2015-08-01.
-  Archived November 14, 2014, at the Wayback Machine.
- "USA 'an enigma' says Harris Tweed company chairman". BBC News. 2009-12-30. Retrieved 2015-08-01.
- "South Korea target market for Harris Tweed mill". Bbc.co.uk. 2012-01-12. Retrieved 2015-08-01.
- "Strong year for Harris Tweed predicted". Stornoway Gazette. 2013-01-16. Retrieved 2015-08-01.
- Hunter, Janet: The Islanders and the Orb. Acair Ltd. 2001. ISBN 0-86152-736-4
- Dunbar, John Telfer: The Costume of Scotland. London: Batsford, 1984, ISBN 0-7134-2534-2, 1984 (paperback 1989, ISBN 0-7134-2535-0)
- Fraser, Jean: Traditional Scottish Dyes. Canongate, 1983, ISBN 0-86241-108-4
- Vogler, Gisela (2001). A Harris Way of Life: Marion Campbell (1909–1996). West Tarbert: Harris Voluntary Service. ISBN 090396029X.