Commercial Definition
Standardized percentage adjustments added to the bone-dry weight of textile materials determine commercial trading mass under international trade terms. Applying a moisture allowance compensates for ambient humidity absorption, establishing a fair transaction weight for raw fibers and spun yarns. Wool and cotton materials possess distinct official regain percentages regulated by trade associations.
Buyers and sellers agree to settle invoices based on this calculated weight rather than variable unconditioned scale weights measured at factory gates.
Contractual Calculation
Testing laboratories determine true dry mass by oven-drying representative samples from commercial shipments. Adding the agreed moisture allowance to this oven-dry baseline calculates the commercial weight used for billing. For example, combed wool top carries an official regain allowance of eighteen point two five percent, whereas cotton carries an allowance of eight point five percent.
Applying these standard percentages prevents disputes arising from atmospheric moisture gain or loss during transit. Invoice adjustments reflect the exact difference between delivered scale weight and calculated commercial weight.
Financial Consequence
Discrepancies between actual moisture content and standard regain allowances directly shift financial value across bulk fiber transactions. Invoicing without applying standard regain corrections leads to overpaying for absorbed water or underpaying for fiber mass.
Adjustment Boundary
Fiber lots contaminated with excessive spinning oils or sizing agents distort regain calculations. The standard regain rate fails to represent actual material value when non-hygroscopic chemical coatings alter moisture absorption behavior.
