Moisture Regain Corrections in Gravimetric Linear Density Testing of Hackled Line Flax
Accurate gravimetric testing of line flax linear density demands dry mass weighing and standard twelve percent regain adjustment per ISO 6741.
Supply Contract Specification
Commercial Requirement
Technical annexes attached to commercial purchasing agreements define the mandatory quality parameters, testing standards and physical metrics of delivered goods. The supply contract specification governs shipments of raw flax fibre, wet spun linen yarn or finished linen fabric between trading partners in the textile supply chain. In Chinese linen manufacturing, this legal document sets precise thresholds for fibre grade, yarn count, breaking tenacity, moisture regain and allowable defect points.
Mill procurement teams use these contractual criteria to accept, penalize or reject imported raw material lots upon arrival. The specification establishes the technical baseline for laboratory verification, expiring only when goods pass final commercial audit and invoice clearance.
Quality Parameter
Detailed schedules quantify physical performance targets using standard national and international textile testing protocols. The supply contract specification for wet spun flax yarn defines nominal lea count, single yarn strength, twist per meter, coefficient of variation percentages and maximum permissible slub counts per kilometer under GB/T 2543 standards. For raw scutched flax, the specification sets limits on shive content, hackled yield and colour uniformity.
Buyers of finished linen fabric include requirements for colour fastness, dimensional stability after laundering and tensile tear strength under standard ASTM or ISO methods. Commercial dispute panels evaluate delivered lots strictly against the numerical tolerances defined in these specification schedules.
Verification Protocol
Receiving mills extract representative test samples from arriving shipments in accordance with statutory lot sampling rules. The supply contract specification instructs testing laboratories on the specific conditioned atmosphere, sample size and instrument calibration methods required for verification testing. If laboratory results indicate that a flax shipment fails the minimum tensile tenacity threshold, the buyer issues a formal non conformance claim supported by the official laboratory test report.
Contract terms dictate whether minor variances result in price deductions or complete lot rejection at the supplier expense. The finalized test document is permanently appended to the commercial transaction file as proof of contract fulfillment.