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.
Radsimir (Rad'-Si-Mer). [From French ras de St. Maur, cloth of St. Maur] A rich description of dress silk, in the weaving of which a marseilles or cut cashmere effect is produced by dropping a thread of weft at regular intervals, generally from one-sixteenth to one-quarter of an inch apart. This produces a sunken line from side to side of the web, alike on back and face. Between the sunken lines the weave is fine and close, like peau de soi.