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SILK has a romantic history shrouded in regal legend, and the silk worm’s life cycle is itself an exciting drama. A moth lays eggs that, after an incubation period, hatch into tiny, hungry silk worms. In about a month, each worm eats thousands of times its weight in mulberry leaves, growing rapidly and shedding its skin several times. Then it spins its cocoon. If allowed to continue the cycle, the worm transforms itself into a moth, which emerges from the cocoon to mate and lay more eggs. If the cocoon is to be used for silk, however, the worm is baked and dried in its blanket, and the fine protein fiber is unreeled in a continuous filament, which may be from 1 500 to 4000 feet (450 m to 1200 m) long. A stiff natural gum called sericin is boiled away, and silk filaments are combined to form very fine threads. Silk is extremely strong, absorbent, warm, resilient, and highly elastic.
COTTON is a vastly popular, versatile, and relatively inexpensive fiber that produces durable, comfortable fabrics. Magnified cotton has a ribbon-like appearance and is of fairly uniform thick ness. The many types of cotton fibers range in length from 1/2" to 2 1/2" (13 mm to 6.5 cm). It is naturally soft and easily spun into a variety of textures. The cellulose of which cotton is com posed is an inert substance, and as a result untreated cotton may have little resiliency and wrinkle easily. However, its normally high strength increases when wet, making it exceptionally easy to launder, and its natural absorbency makes it receptive to a variety of treatments, such as mercerization, color application, and wrinkle-resistant and easy-care finishes, which add to its desirability.
FLAX is the plant from whose stems linen is made. By a process developed at the dawn of civilization, the outer woody portion of the stalk is rotted away, leaving long, soft, strong fibers composed of cellulose. The magnified fiber has a jointed structure similar to that of bamboo, and the thickness may vary widely. Length ranges from 5” to 20” (12.5cm to 51 cm). Because of their similar composition, linen resembles cotton in many ways, including its ability to withstand high temperatures and it’s easy to launder with low resistance to wrinkling. In addition, it is extremely durable and, if stored properly, will withstand years of use. However, the flax fiber tends to be stiffer than cotton, and linen fabrics are subject to abrasion and wear along edges and creases. Other plant fibers that are similar to linen are hemp, jute, ramie and even bamboo. These are known as bast fibers as they are found in the stem of the plant.
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This page was last modified on: Sunday, 2008-08-24 17:29 PST