Invoiced Mass
Standardized mass calculation protocols convert raw or conditioned flax fiber weights into official billable trade weights using designated moisture regain allowances. In international linen commerce, commercial mass determination establishes the baseline payable weight by combining the oven-dry mass of the shipment with the official standard moisture regain percentage. Bales of scutched flax or packages of wet-spun yarn absorb atmospheric moisture during transit, making direct scale weighing inaccurate for billing purposes.
The calculation standardizes commercial billing across varying climatic conditions in export warehouses.
Oven Method
Laboratory technicians extract representative fiber samples from sealed bales across the consignment lot. Drying the samples in ventilated ovens at one hundred five degrees Celsius removes all uncombined water until constant dry weight is achieved. Applying commercial mass determination formulas to this dry baseline yields the certified invoice mass.
Testing certificates issued by China Inspection and Quarantine document these precise laboratory values.
Contract Clearance
Financial settlements between flax spinners and raw fiber traders rely entirely on certified weight documentation. Discrepancies between physical landing weight and commercial mass determination values trigger price adjustments under standardized contract terms. Official certificates protect buyers against paying for excess moisture absorbed during sea transport.
Settled accounts require full alignment between mill verification lab measurements and customs entry sheets.
