Fiber derived from the bast or skin of the stem of the species Linum usitatissimum. Soft, flexible fibers are produced by retting the stem of the flax 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 for linen fabric, thread for making shoes and bookbinding, fish line, and twine. Waste flax fibers are used in banknotes, cigarette covers, and writing and drawing paper.取自亞麻之莖的韌皮或外殼的纖維，質軟而柔韌，是藉由浸漬亞麻植物的莖，接著再洗滌與清潔纖維而製成。亞麻纖維比棉更細、更長，但纖維管壁較厚，因此製出之線較強韌。用於製作亞麻布料、製鞋與裝訂書本用的亞麻線、釣魚線以及合股線；廢棄的亞麻纖維可用於鈔票、捲煙紙以及書寫與繪畫用的紙張製作。