Fibre Classification
The mass per unit length of raw flax fibres defines the metric number used to grade natural stocks during the initial scutched sorting phase of textile production. This metric number captures the linear density of individual fibre bundles or strands before spinning occurs. Quality inspectors assess these batches upon arrival at the mill to separate coarse materials destined for heavy twine from finer inputs suitable for premium yarn.
Raw stalks undergo mechanical processing where separators isolate the bast from the woody core. A laboratory technician weighs a ten meter length of cleaned fibre to calculate the specific weight relative to length. Values higher than the baseline indicate thicker fibres that resist drafting during the carding process.
Factories reject lots falling outside established density parameters to maintain consistent output across the machines.
Processing Baseline
Spinning supervisors apply a metric number to verify that roving tension remains stable while the frames pull the material into fine threads. This value dictates the settings for the drawing rollers that align the strands. Machines operate at speeds calibrated to the weight per unit length of the input roving.
When the weight drifts, the mechanical torque of the spinning frame changes to compensate for the variation. Precise calibration prevents strand breakage during the high speed winding of the bobbins. Technicians monitor the real time output against the initial fibre grade recorded in the mill log.
Shifts in humidity affect the weight of the raw material and force adjustments to the load settings on the rollers. Operators use these readings to track performance against the buyer acceptance criteria set for the final cloth.
Production Verification
Woven fabric density relies on the metric number of the yarn to ensure that the finished cloth meets the weight requirements stated in the contract between the mill and the exporter. Finishing departments test swatches after the final wash to confirm the fabric count remains accurate. Consistent tension throughout the loom process yields uniform dimensions that hold up under standard pull tests.
Final cloth rolls pass inspection when the yarn mass aligns with the target specifications documented in the master file. Accurate sizing confirms the manufacturing process maintains the integrity of the raw fibre properties from origin to export.
