beiderwand

a subset of lampas (a form of double weave with a main or foundation structure and a secondary or patterning structure). In beiderwand, free double cloth appears in the areas where the main structure is woven on the top surface of the cloth (usually the pattern areas). In the other areas (usually the background) the secondary weft weaves over the main structure, but the secondary warp remains underneath, causing the two structures to be interconnected. The ratio of main warp ends to secondary warp ends in beiderwand is 4:1; the ratio of main weft to secondary weft is 1:1. The main and secondary structures are both plain weave.