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.
Spongre Silk. A knitted fabric made from the waste or sweepings of silk. It is made out of the husks, the butts, and the odds and ends of everything left around the floor of a silk mill by way of wastes or shoddies. The knitted fabric or article looks very much like a rough crash or low grade of cotton toweling, only it is knitted and of very light weight. It is used for draperies and underwear, and also to wipe silverware and machinery.