Velvet is woven on a special loom that weaves two thicknesses of the material at the same time. The two pieces are then cut apart to create the pile effect, and the two lengths of fabric are wound on separate take-up rolls. This complicated process meant that velvet was expensive to make before industrial power looms became available, and well-made velvet remains a fairly costly fabric. Velvet is difficult to clean because of its pile, but modern dry cleaning methods make cleaning more feasible. Velvet pile is created by warp or vertical yarns and velveteen pile is created by weft or fill yarns.
Velvet can be made from several different kinds of fibers, traditionally, the most expensive of which is silk. Velvet made entirely from silk has market prices of several hundred US dollars per yard. Cotton can also be used, though this often results in a slightly less luxurious fabric. Velvet can also be made from fibers such as linen, mohair, and wool. A cloth made by the Kuba people of the Democratic Republic of Congo from raffia is often referred to as “Kuba velvet”. More recently, synthetic velvets have been developed, mostly from polyester, nylon, viscose, acetate, and from either mixtures of different synthetics or from combined synthetics and natural fibers (for example viscose mixed with silk produces a very soft, reflective fabric). A small percentage of spandex is sometimes added to give the final material a certain amount of stretch.