tied unit weaves

supplementary-weft unit weaves in which each unit contains specific warp ends that act as tie-down ends to tie supplementary pattern weft floats to a ground cloth (usually plain weave). The structural unit is complete when all of the tie-down ends in the sequence have been threaded. Each unit alternates tie-down ends with pattern ends; the number and ratio vary. The number of tie-down ends and the order in which they tie the supplementary weft floats also vary.