Velvet is a fabric with a short, tightly woven pile, originally made of silk; it is today made of rayon, nylon, acrylic and cut pile fabrics.
Synthetic fibres are a term used on human-made treads. Chemicals combined into large molecules called polymers produce fibres like nylon, polyester, spandex, acrylic, modacrylic, olefin, saran, spandex, and vinyl.
Man-made fibre. Viscose and Acetate, derived from cellulose, were almost all the human-made fibres in existence before World War II. During the 1930s, after intensive fibre research, several new synthetic fibres were produced which led to the production of nylon.
Acrylic fibre. A synthetic fibre that is made with just the right combination of coal, air, water, petroleum and limestone.
Moisture regained is a measurement term used to describe the weight of moisture in a material expressed as a percentage of the oven-dry weight.