Velvet is a fabric with a short, tightly woven pile, originally made of silk; it is today made of rayon, nylon, acrylic and cut pile fabrics.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.
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.