Loom Efficiency Losses on Fine Setts and Who Absorbs Them
Fine warp setts collapse loom efficiency through yarn cling and stops; buyers absorb costs via sett surcharges unless target efficiency caps are contracted.
Reed Streak
Fiber Alignment
Irregular tension across a flax roving damages the final yarn during spinning in Chinese linen mills. Reed streak designates a linear density variation caused by broken wires within the metallic denting apparatus. Technicians record this defect upon inspection sheets before wet spinning batches enter the bleaching vans.
A standard fibre grade describes raw material cleanliness, whereas a fabric grade measures finished cloth density under export lighting. Mills apply internal tolerance thresholds that are stricter than buyer acceptance criteria to protect export margins.
Density Variance
Uneven reed spacing permits localized bunching during the consolidation stage of yarn preparation. Plant supervisors identify reed streak through visual shadow mapping against backlit inspection tables. The defect alters local twist coefficients, which creates weak points during high-speed bobbin winding.
Chinese export standards penalize fabric consignments when linear mass anomalies exceed established thresholds per linear meter.
Export Tolerance
Contractual disputes arise when overseas buyers reject shipments containing linear density flaws originating from worn dent wires. Mill laboratories verify compliance by weighing extracted yarn segments across standardized meter lengths. Production managers adjust loom beat up pressure to compensate for minor dent displacement before weaving proceeds.
Finished linen export documentation lists the measured linear deviation index to satisfy international quality verification protocols.