unit weaves

pattern weave structures in which a specific number of warp ends and weft picks interlace in a specific way to produce either pattern or background independently of but identically to other groups. A specific threading formula?the threading unit?is substituted for one filled square of a profile threading draft. Pattern or background is woven in each unit by substituting a specific lifting order for filled (pattern) or empty (background) squares on a profile treadling draft. 'Unit' is a structural term; 'block' refers to design. In summer and winter, the threading formula for one unit of block A is 1-3-2-3.