Felt is a textile material that is produced by matting, condensing and pressing fibers together. Felt can be made of natural fibers such as wool, or from synthetic fibers such as petroleum-based acrylic or acrylonitrile or wood pulp-based rayon. Blended fibers are also common. 
Felt from wool is considered to be the oldest known textile. Many cultures have legends as to the origins of felt making. Sumerian legend claims that the secret of feltmaking was discovered by Urnamman of Lagash. The story of Saint Clement and Saint Christopher relates that while fleeing from persecution, the men packed their sandals with wool to prevent blisters. At the end of their journey, the movement and sweat had turned the wool into felt socks.
Feltmaking is still practised by nomadic peoples (Altaic people: Mongols; Turkic people) in Central Asia, where rugs, tents and clothing are regularly made. Some of these are traditional items, such as the classic yurt (Gers), while others are designed for the tourist market, such as decorated slippers. In the Western world, felt is widely used as a medium for expression in both textile art and contemporary art and design, where it has significance as an ecologically responsible textile and building material.
In the wet felting process, hot water is applied to layers of animal hairs, while repeated agitation and compression causes the fibers to hook together or weave together into a single piece of fabric. Wrapping the properly arranged fiber in a sturdy, textured material, such as a bamboo mat or burlap, will speed up the felting process. The felted material may be finished by fulling.
Only certain types of fiber can be wet felted successfully. Most types of fleece, such as those taken from the alpaca or the Merino sheep, can be put through the wet felting process. One may also use mohair (goat), angora (rabbit), or hair from rodents such as beavers and muskrats. These types of fiber are covered in tiny scales, similar to the scales found on a strand of human hair. Heat, motion, and moisture of the fleece causes the scales to open, while agitating them causes them to latch onto each other, creating felt. There is an alternative theory that the fibers wind around each other during felting. Plant fibers and synthetic fibers will not wet felt.
Needle felting is a method of creating felted objects without using water. The special needles used to make 3D sculpture, jewelry, adornments and 2D art have notches along the shaft of the needle that catch fibers and tangle them with other fibers to produce felt. These notches are sometimes erroneously called "barbs", but barbs are protrusion (like barbed wire) and that would be difficult to thrust in to the wool and nearly impossible to pull out. There are many sizes and types of notched needles for different uses while working. Needle felting is used in industrial processes as well as in individual crafting. 
Invented in the mid 17th century and used until the mid-20th centuries, a process called "carroting" was used in the manufacture of good quality felt for making men's hats. Beaver, rabbit or hare skins were treated with a dilute solution of the mercury compound mercuric nitrate. The skins were dried in an oven where the thin fur at the sides turned orange, the colour of carrots. Pelts were stretched over a bar in a cutting machine, and the skin was sliced off in thin shreds, with the fleece coming away entirely. The fur was blown onto a cone-shaped colander and then treated with hot water to consolidate it. The cone then peeled off and passed through wet rollers to cause the fur to felt. These 'hoods' were then dyed and blocked to make hats. The toxic solutions from the carrot and the vapours it produced resulted in widespread cases of mercury poisoning among hatters. This is the origin of the phrase "mad as a hatter" which was used to humorous effect by Lewis Carroll in the chapter "A Mad Tea Party" (Alice in Wonderland)
Felt in musical instruments
Many musical instruments use felt. It is often used as a damper. On drum cymbal stands, it protects the cymbal from cracking and ensures a clean sound. It is used to wrap bass drum strikers and timpani mallets. Felt is used extensively in pianos; for example, piano hammers are made of wool felt around a wooden core. The density and springiness of the felt is a major part of what creates a piano's tone. As the felt becomes grooved and "packed" with use and age, the tone suffers. Felt is placed under the piano keys on accordions to control touch and key noise; it is also used on the pallets to silence notes not sounded by preventing air flow.
Felt in arts and crafts
|This section does not cite any sources. (December 2016) (Learn how and when to remove this template message)|
Felt is used for framing paintings. It is laid between the slip mount and picture as a protective measure to avoid damage from rubbing to the edge of the painting. This is commonly found as a preventive measure on paintings which have already been restored or professionally framed. It is widely used to protect paintings executed on various surfaces including canvas, wood panel and copper plate.
A felt-covered board can be used in storytelling to small children. Small felt cutouts or figures of animals, people, or other objects will adhere to a felt board, and in the process of telling the story, the storyteller also acts it out on the board with the animals or people. Puppets can also be made with felt. Felt pressed dolls, such as Lenci dolls, were very popular in the nineteenth century and just after the first world war.
Felt in art and design
Felt in fashion
During the 18th and 19th centuries gentlemen's top hats made from beaver felt were popular. In the early part of the 20th century, cloth felt hats, such as fedoras, trilbies and homburgs, were worn by many men in the western world. Felt is often used in footwear as boot liners, with the Russian valenki being an example.
- "What’s the difference between wool, acrylic, wool blend, and eco felt? Part 1 Wool.". 31 March 2009.
- "Acrylic felt & eco- felt (I.E eco spun) same damn thing! Part 2 of whats the difference between wool, acrylic, wool blend, and eco felt?". 1 April 2009.
- "Wool Felt Blends- part 3 of Whats the difference between wool, acrylic, wool blend, and eco felt?". 4 April 2009.
- Chad Alice Hagen (2005). Fabulous Felt Hats: Dazzling Designs from Handmade Felt. Lark Books. pp. 8–. ISBN 978-1-57990-542-2.
- Dan Howard (2011). Bronze Age Military Equipment. Casemate Publishers. pp. 69–. ISBN 978-1-84884-293-9.
- Chris Thompson (2011). Felt: Fluxus, Joseph Beuys, and the Dalai Lama. U of Minnesota Press. pp. 56–. ISBN 978-0-8166-5354-6.
- The Recent Development of American Industries. University of Pennsylvania Press. 1891. pp. 63–.
- Melvyn C. Goldstein; Cynthia M. Beall (1994). The Changing World of Mongolia's Nomads. University of California Press. pp. 147–. ISBN 978-0-520-08551-0.
- Becky Kemery (2006). Yurts: Living in the Round. Gibbs Smith. pp. 160–. ISBN 978-1-58685-891-9.
- Front Lines. U.S. Agency for International Development. 2006.
- Maria Block; Varis Bokalders (9 February 2010). The Whole Building Handbook: "How to Design Healthy, Efficient and Sustainable Buildings". Routledge. pp. 57–. ISBN 978-1-136-54328-9.
- Forestry Leaves. 1963.
- Sabine Fouchier (12 February 2009). Felt. A&C Black. pp. 9–. ISBN 978-0-7136-8494-0.
- Teachers World. Bemis Publishing Company. 1893. pp. 219–.
- O. J. Petrie (1995). Harvesting of Textile Animal Fibres. Food & Agriculture Org. pp. 19–. ISBN 978-92-5-103759-1.
- The Chemical News. Mitchell. 1860. pp. 257–.
- Sarah E. White (1 January 2008). Picture Yourself Felting Your Knitting: Step-by-step Instruction for Perfectly Felted Crafts. Course Technology. pp. 10–. ISBN 978-1-59863-665-9.
- Krishan Chawla (2 June 2016). Fibrous Materials. Cambridge University Press. pp. 24–. ISBN 978-1-107-02972-9.
- Technical educator (1871). The technical educator, an encyclopædia. pp. 1–.
- Andrea Price; Patti Pierce Stone (13 September 2011). Knitspeak: An A to Z Guide to the Language of Knitting Patterns. STC Craft, Melanie Falick Books. pp. 76–. ISBN 978-1-4532-2078-8.
- Alicia Kennedy; Emily Banis Stoehrer; Jay Calderin (1 February 2013). Fashion Design, Referenced: A Visual Guide to the History, Language, and Practice of Fashion. Rockport Publishers. pp. 153–. ISBN 978-1-59253-677-1.
- Wonderful West Virginia. Department of Natural Resources. 2005.
- Pat Pawlowicz
- Jack Larkin (23 November 2010). Where We Worked: A Celebration Of America's Workers And The Nation They Built. Lyons Press. pp. 95–. ISBN 978-1-4617-4592-1.
- Mary Ellen Snodgrass (17 March 2015). World Clothing and Fashion: An Encyclopedia of History, Culture, and Social Influence. Routledge. pp. 251–. ISBN 978-1-317-45167-9.
- Beverly Chico (3 October 2013). Hats and Headwear around the World: A Cultural Encyclopedia: A Cultural Encyclopedia. ABC-CLIO. pp. 309–. ISBN 978-1-61069-063-8.
- Bonnier Corporation (November 1941). Popular Science. Bonnier Corporation. pp. 52–. ISSN 0161-7370.
- Cooper-Hewitt museum description of Mosen rug.
- Ethan Winer (12 November 2012). The Audio Expert: Everything You Need to Know About Audio. CRC Press. pp. 629–. ISBN 978-1-136-12614-7.
- Hugo Pinksterboer (1 January 1993). The Cymbal Book. Hal Leonard. pp. 88–. ISBN 978-1-4768-6639-0.
- Steven L. Schweizer (28 June 2010). Timpani Tone and the Interpretation of Baroque and Classical Music. Oxford University Press. pp. 13–. ISBN 978-0-19-975041-2.
- Nicholas J. Giordano (8 September 2016). Physics of the Piano. OUP Oxford. pp. 113–. ISBN 978-0-19-250663-4.
- Robert Palmieri (1 June 2004). The Piano: An Encyclopedia. Routledge. pp. 161–. ISBN 978-1-135-94964-8.
- David C Wickens (1 December 1987). The Instruments of Samuel Green. Palgrave Macmillan UK. pp. 44–. ISBN 978-1-349-09059-4.
- Arthur W. J. G. Ord-Hume (1978). Barrel organ: the story of the mechanical organ and its repair. A. S. Barnes, Incorporated. ISBN 978-0-498-01482-6.
- Thomas Campbell Young (1947). The Making of Musical Instruments. Oxford University Press.
- Deborah Schneiderman; Alexa Griffith Winton (28 January 2016). Textile Technology and Design: From Interior Space to Outer Space. Bloomsbury Publishing. pp. 48–. ISBN 978-1-4742-6196-8.
- Beverly Gordon (May 1980). Feltmaking. Watson-Guptill Publications.
- Joseph Beuys; Volker Harlan (2004). What is Art?: Conversation with Joseph Beuys. CLAIRVIEW BOOKS. pp. 65–. ISBN 978-1-905570-07-2.
- Dietland Muller-Schwarze (7 April 2011). The Beaver: Its Life and Impact. Cornell University Press. pp. 156–. ISBN 0-8014-5010-1.
- Eric Jay Dolin (5 July 2011). Fur, Fortune, and Empire: The Epic History of the Fur Trade in America. W. W. Norton. pp. 22–. ISBN 978-0-393-34002-0.
- Bernard A. Drew (22 December 2009). Literary Afterlife: The Posthumous Continuations of 325 Authors' Fictional Characters. McFarland. pp. 45–. ISBN 978-0-7864-5721-2.
- Brenda Grantland (1 June 2016). Hatatorium: An Essential Guide for Hat Collectors. Brenda Grantland. pp. 76–. ISBN 978-0-9847859-0-2.
- Russia Beyond The Headlines (12 December 2014). Russian Winter: Photo album. Russia Beyond The Headlines. pp. 91–. GGKEY:G7NRFZX3WQF.
- Symposium on Antarctic Logistics, Held at Boulder, Colorado, August 13-17, 1962. National Academies. 1963. pp. 637–. NAP:12264.
- E.J.W. Barber. Prehistoric Textiles: The Development of Cloth in the Neolithic and Bronze Ages, with Special Reference to the Aegean. Princeton: Princeton University Press, 1991.
- Lise Bender Jørgensen. North European Textiles until AD 1000. Aarchus: Aarchus University Press, 1992.
|Wikimedia Commons has media related to Felt.|
- Wtifelt.com, What is felt, felt history, how felt is made