Textile Measurement
Quantitative analysis of flax fibres depends on the determination of commercial mass to account for inherent moisture content. The iso 6741-2 standard establishes the laboratory procedure for weighing samples after conditioning to a specific moisture regain value. This calculation removes price distortions caused by water weight in raw fibre consignments.
Corrected mass measurements provide a stable basis for financial settlements between mills and suppliers. Accuracy relies on the precision of the initial balance weight and the exact calculation of the dry mass fraction.
Sampling Condition
Representative specimen selection requires separating fibre batches into smaller, homogeneous units for oven drying. Practitioners draw at least four specimens from the bulk supply to minimize variance before subjecting them to thermal extraction. Every specimen undergoes drying until the mass remains stable across successive weighings.
This stability confirms the removal of all volatile water content from the cellulose structure. Final results derive from the average of these individual measurements to reduce the margin of error in total batch weight.
Mass Correction
Converting the oven dry weight to commercial mass necessitates applying the official regain percentage assigned to flax, which remains fixed at twelve percent according to established trade norms. Multiplying the dry mass by the factor of one point one two adjusts the load for standard moisture distribution. Discrepancies between the calculated commercial mass and the scale weight indicate excessive humidity levels in the raw stock.
Such variance allows the buyer to apply deductions proportional to the water content exceeding the defined limit. Moisture correction protocols prevent the unintended purchase of water at fibre prices.
