Invoicing Standard
Commercial mass calculations in flax trading rely on standardised dry-weight protocols to adjust raw shipment weights to agreed moisture levels. A baseline moisture regain correction converts actual scale weight measured at mill receipt into official invoice weight by applying an agreed moisture percentage to oven-dry fiber mass. Standard trade conventions set official regain for scutched flax fibre at twelve percent, while tow and yarn allocations follow specified commercial contracts.
Shipments arriving above or below target moisture levels require mass adjustment before payment settlement.
Correction Calculation
Dry mass determination requires heating sample material in an oven until mass stabilizes, establishing true dry content. The baseline moisture regain correction then multiplies oven-dry weight by one plus the official regain fraction, yielding net commercial weight. If raw scutched flax arrives weighing ten metric tons with an actual moisture regain of fourteen percent, dry mass equals eight point seven seven metric tons.
Applying the standard twelve percent allowance produces a net invoice weight of nine point eight two metric tons. Chinese mills record these adjusted figures on official incoming material inspection logs to prevent paying for excess water weight during raw material acquisition.
Moisture Boundary
Moisture allowances cease to apply once spinning preparation subjects raw fibre to liquid immersion or chemical wet processing. Baseline moisture regain correction governs raw flax bales and combed tops before internal mill processing alters moisture equilibrium.
