Calculating Plain Linen Target Weight from Yarn Count
Target linen weight equals yarn tex multiplied by thread density, adjusted for warp size, crimp, wet process mass loss, and area shrinkage factors.
Warp Size
Protective Film
Chemical sizing formulations applied to longitudinal yarn sheets consist of water-soluble polymers, film formers, binding agents, and lubricants designed to encase protruding fiber ends and increase yarn tensile endurance during loom operations. The applied warp size forms a smooth, flexible surface coating that protects brittle wet-spun or dry-spun flax yarns against aggressive reed friction and heald wire abrasion. In linen cloth manufacturing, sizing operations bridge the gap between warp beaming and loom shed insertion.
The functional lifecycle of the substance ends after fabric formation, where finishing plants strip the chemistry completely during open-width desizing operations.
Formulation Chemistry
Modern recipes for pure linen and linen-cotton blends combine modified potato or corn starches with synthetic binders such as polyvinyl alcohol and acrylic co-polymers. Sizing technicians blend these polymers with emulsified vegetable waxes inside pressurized cooking kettles to ensure stable viscosity at operating temperatures around eighty-five degrees Celsius. Pure flax yarns possess irregular surface profiles and low natural elongation, requiring a warp size formulation that provides high film flexibility without making the yarn brittle.
Refractometer readings monitor solid concentrations while automated circulation pumps maintain constant size box levels during processing. Size box temperature logs and viscosity cup flow times are recorded for every sizing run to guarantee consistent yarn penetration. If the coating formula fails to penetrate between outer flax bundles, yarn separation occurs under loom harness cycling, generating fiber fuzz and stop motions.
Desizing Removal
Commission dyehouses select enzymatic or oxidative desizing recipes based on the exact polymer composition reported on the greige mill specification sheet. Complete extraction of the protective film is verified through standard iodine spot testing before fabric advances into continuous bleaching ranges.