Any plant of the genus Linum, especially Linum usitatissimum that is native to Europe. Flax plants are grown for both their fibers and seeds. Flax fibers are believed to be the first vegetable fiber used by man (about 5000 CBE). They have been found in prehistoric cave dwellings in Switzerland. Ancient Egyptian pictographs detail the process for making flax into cloth and linen mummy cloths have been found. By the 17th century, linen manufacturing was an important industry in Western Europe. The soft, flexible fibers are produced by retting the stem of the plant, then washing and cleaning the fibers. Flax fibers of thinner and longer than cotton, but the fiber tube has thicker walls resulting in a stronger thread. Additionally, flax fibers are used to make shoe thread, bookbinding thread, fish line, twine, and paper. Waste flax fibers are used in banknotes, cigarette covers, and writing paper. The seeds from the flax plant are used to produce linseed oil. Linseed oil is used for cooking and as a paint medium.
Synonyms and Related Terms
Linum usitatissimum; Hør (Deut.); lino (Esp.); linum (Fr.); vlas (Ned.); linho (Port.); lin (Sven.);
Resistant to alkali, dilute acid, most organic solvents. Degrades in strong acids. Elongation = 1.8% (dry); 2.2% (wet); Moisture regain = 12%; Fiber length = 6-65 mm; diameter = 0.02 mm; Natural fiber color = yellowish to pale gray. Chlorine test stains linen fibers a bright red.
Paper fiber type: non-woody/bast. Using transmitted light microscopy, fibers are identified by their prominent nodes with cross-markings and dislocations. Fibers are long with indistinguishable lumens. If shive was used, additional small pitted fibers, pitted vessel elements, and other cells may be present. Difficult to distinguish from other bast fiber. Appearance with Graff "C" stain: pinkish red due to high alpha cellulose; nodes will stain red. Average dimensions of fibers: length 33mm, width 19μm. Common pulping method: Soda.
Hazards and Safety
Degrades slowly in sunlight and temperatures above 120C. Resistant to mildew, insects and pests. Silverfish will eat starched flax.
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