Trade Valuation
Invoiced weights of traded textile fibres require standardized mass corrections to account for ambient moisture absorption. Commercial regain allowance establishes an agreed percentage added to the bone-dry mass of raw flax or spun linen yarn to determine final billable weight. Moisture uptake varies with atmospheric humidity, making uncorrected physical mass unreliable for commercial transactions across international ports.
Contracts governing raw flax exports from Heilongjiang or European suppliers reference fixed percentages set by international body standards to prevent disputes over weight fluctuations caused by weather during transit.
Moisture Standard
Laboratory testing of imported flax bundles determines bone-dry mass through forced-air oven drying at elevated temperatures. Once dry mass is established, commercial regain allowance is applied mathematically to calculate the certified commercial mass listed on the shipping invoice. For pure flax fibre, standard trade regulations fix this value at twelve percent, whereas blended yarns use weighted averages based on component fibre ratios.
Mill receiving departments weigh incoming bales and compare certified moisture values against mill laboratory oven tests. Discrepancies exceeding agreed tolerances trigger commercial adjustments before payment clearance, ensuring buyers do not pay for excess moisture absorbed during sea transport.
Settlement Calculation
Spinning mills incorporate this corrected mass into yield calculations to maintain accurate cost accounting across production batches. Commercial regain allowance sets the legal mass baseline for export customs declarations, mill inventory tracking, and yarn sales contracts. Export bills of lading state the calculated commercial mass alongside physical gross mass.
