Standard Laboratory Methods for Flax Yarn Linear Density Determination
Standard flax yarn linear density determination mandates motorized skein reeling under 0.5 cN/tex tension combined with ISO 6741 oven-dry commercial mass correction.
Skein Reeler
Lea Apparatus
Benchtop winding apparatuses draw designated continuous yarn lengths into skeins or leas under precise circumferential control for physical density evaluation. In textile testing laboratories, a skein reeler winds a precise number of turns on an expanding collapsible reel to generate standard sample lengths for linear density determinations. The machine incorporates a traverse motion to lay yarn strands evenly across the reel circumference without overlapping.
Its operational scope covers laboratory sample preparation and commercial hank reeling, stopping at continuous package winding.
Count Determination
Laboratory technicians mount spun linen bobbins onto the supply creel of the skein reeler to measure yarn count in English lea or metric tex. The operator threads the flax yarn through calibrated pre-tensioners and friction guides to ensure uniform winding tension across all sample positions. Once the preset revolution counter reaches the standard count length, typically one hundred and twenty yards for a linen lea, the machine stops automatically.
The technician collapses the reel mechanism, slides the completed skeins off the arms, and places them in conditioning ovens prior to analytical weighing.
Spindle Allocation
Commercial hank-dyeing preparation departments use multi-position skein reelers to convert large wet-spun spinning packages into permeable hanks for liquor circulation. The equipment maintains uniform hank circumference and perimeter tension across forty to fifty simultaneous winding ends. Tension discrepancies created at the reeler result in uneven dye liquor penetration, producing patchy colour depth across the processed linen yarn.
Mill shift logs record the reeler spindle speeds, operator identification, and target hank weights for traceability throughout the wet dyehouse. Calibrated reeling provides reliable sample uniformity for strength testing, lea count verification, and batch dyeing consistency.