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.
Rep. [Corrupted from rib] A style of weaving in which the surface presents a transverse-ribbed appearance, by close, round twills or cords extending in a diagonal direction across the web. Furniture rep is a flowered cotton goods woven in this manner. Worsted rep is used for upholstering and curtains, and is 1 1/2 yards wide, dyed in solid colors. Silk rep is used for ladies' dresses, ecclesiastical vestments, etc., and is narrow, usually 22 inches. The word is also applied to a thin worsted dress goods. In a general sense rep is used to describe any transversely-ribbed cloth, as distinct from "cords," which are of similar structure, but extending lengthwise of the fabric.