Calculating Commercial Mass Regain Adjustments for Dehaired Specialty Animal Fibres
Commercial mass regain adjustments recalculate dehaired specialty fibre billing weight by converting net scale mass to clean dry keratin plus official allowances.
Fine Animal Hair Regain
Moisture Allowance
Standardised moisture percentages define the commercial mass of dry specialty animal fibres under international trade rules. Application of fine animal hair regain establishes the official invoice mass by adding an agreed moisture percentage to the oven-dry mass of raw or processed fibres. Trade associations specify exact regain allowances for cashmere, mohair, alpaca, and camel hair to standardise trading terms worldwide.
This specification applies strictly to commercial weight determination and does not dictate processing room humidity targets.
Regain Calculation
Laboratory drying ovens reduce core samples to zero moisture content at controlled temperatures. Formulae multiply the dry weight by one plus the percentage regain divided by one hundred. The resulting commercial mass serves as the binding billing weight for high-value specialty fibre shipments.
Atmospheric Equilibrium
Keratin fibres absorb or desorb water molecules based on ambient relative humidity and temperature. Specialty animal hairs exhibit high hygroscopicity due to their complex protein structure and porous cuticle scales. Bales stored in humid environments absorb atmospheric water, artificially increasing scale weight without increasing actual fibre content.
Laboratory testing isolates dry mass from ambient fluctuations to calculate commercial weight independently of climate conditions during shipment. Standard regain factors establish transactional equity between buyers and sellers across differing climate zones.
Invoice Adjustment
Commercial invoices modify actual scale mass according to certified regain results. Financial settlements compensate for water weight variations occurring between bale pressing and delivery.