This section is from the "A Complete Dictionary of Dry Goods" book, by George S. Cole. Also available from Amazon: A complete dictionary of dry goods and history of silk, cotton, linen, wool and other fibrous substances,: Including a full explanation of the modern processes ... together with various useful tables.
Corduroy (Cor-Du-Roi'). [French cor du roi, royal cord or King's cord ]. A heavy cotton material, corded or ribbed on the surface. It is extremely durable, being especially used for the garments of men engaged in rough labor, field sports and the like. The construction of corduroy is the same as that of velvet (which see), with a twill foundation and a pile surface. The cords are produced by a peculiar disposition of the pile threads, they being "thrown in" where the corded portions are, and absent in the narrow spaces between them. After leaving the loom and subjected to the operations of "brushing" and "singeing" to give the cloth a smooth and finished surface, it is piece-dyed, usually in shades of olive, slate or drab. [See Weaving]