Raw Allocation
Spinning of linen yarn requires selecting between long-line flax fibers for high-strength yarns and short tow fibers for coarser, lower-grade yarns. Spinners monitor for tow fiber substitution, where cheaper short fibers are mixed into batches intended for high-quality line yarn to reduce production costs. This unauthorized mixing decreases the average fiber length in the sliver, which results in a weaker and more hairy yarn.
This substitution is detected by measuring the fiber length distribution of the raw material before spinning.
Yarn Integrity
Yarn spun with excessive tow fiber exhibits lower tensile strength and higher variation in thickness. If tow fiber substitution occurs, the yarn is prone to breaking during warping and fabric formation, which increases machine downtime and fabric defects. The finished linen fabric made from such yarn will have a rougher texture and lower durability, which does not meet the standards for premium apparel.
This quality issue is documented in the mill’s daily yarn test reports.
Financial Audit
Material yield calculations are performed at each processing stage to ensure that the volume of line yarn produced corresponds to the amount of line flax purchased. This tracking prevents mills from using cheaper tow fibers in premium yarn batches. Discrepancies lead to immediate audits of the fiber inventory.
