Calculating Yarn Requirements for Plain Weave Greige Linen
Exact yarn mass calculation for plain weave greige linen requires converting Lea to Tex, factoring warp crimp, reed width, and 12% standard moisture regain.
Thrum Waste
Yarn Residual
Unwoven yarn ends remaining on the loom beam after the woven fabric has been cut off represent a necessary material loss in textile manufacturing. This unavoidable byproduct, referred to as thrum waste, consists of the warp ends that cannot be drawn through the healds and reed at the end of a warp run. Spinning mills collect and grade this material to track total yarn yield and material efficiency.
Mill Measurement
Calculating the quantity of discarded warp ends involves weighing the yarn remnants after each loom is stripped and cleaned. The thrum waste is weighed and recorded in the daily loom log, with values compared against yarn allocation sheets. Because high-quality flax yarn is expensive to spin, mills attempt to minimize this waste by utilizing thread-tying machines and optimizing warp length calculations.
Recycling this waste into coarser yarns or non-woven industrial textiles helps reclaim some material value.
Efficiency Review
Linen mills monitoring their export costs pay close attention to the percentage of warp yarn lost as waste. When the thrum waste exceeds the standard three percent limit, managers must investigate tension settings or beam winding procedures. These waste reports are compiled monthly and shared with the procurement department to adjust future flax purchases.