Raw Cashmere Classing and Guard Hair Percentage Estimation
Raw cashmere value hinges on clean down yield and optical verification of residual coarse hair content below zero point five percent by mass.
Scoured Clean Yield
Mass Deduction Factor
Raw fibre contains natural oils, soil, and vegetable matter that disappear during the scouring process. Scoured clean yield represents the percentage of dry weight remaining after those impurities leave the raw material in a professional cleaning bath. Buyers verify this value to avoid paying for waste material embedded within a clip or bale.
Processing Baseline
Testing begins with a representative sample taken from a bulk shipment before it hits the production line. Technicians extract the sample, weigh it, and wash the mass in a chemical solvent to remove all non-fibre elements. They dry the residual fibre until it reaches a constant mass to determine the exact weight of pure textile material.
Verification Requirement
Mills utilize this calculation to determine how much actual product reaches the carding or spinning stages. Discrepancies between the estimated amount and the actual cleaned weight force adjustments in production batching to prevent stock shortages. A consistent application of this method ensures that suppliers and processors operate from identical data points regarding raw material quality.
Commercial Metric
Contracts rely on this figure to settle pricing disputes when the physical batch fails to match the documented quality levels. Financial penalties apply when the calculated return of clean fibre falls below the agreed technical specifications defined in the supply agreement. Sellers provide a certificate of analysis to justify the stated weight to the purchaser.
Reliable measurement of this weight reduction provides the absolute floor for material valuation in global commodity trading.