Wool Yield
Laboratory protocols establish the procedure for determining the wool content of raw fleeces by removing vegetable matter and other impurities. The astm d584 standard provides the industry with a reliable method to calculate the clean wool fiber present in a greasy wool sample. Commercial transactions for raw wool rely heavily on these certified yield results to determine the true value of a shipment.
Scouring Verification
This method involves scouring a small specimen with non-ionic detergents followed by drying to a constant mass. Ash content and alcohol-extractable matter are subtracted from the result to reach a final clean weight.
Material Measurement
Accuracy in the final calculation prevents financial losses for both the buyer and the seller of bulk commodities. Because raw wool contains variable amounts of grease, dirt, dust, and plant burrs, a standardized approach is the only way to establish a fair basis for trade. Practitioners apply specific moisture regain factors to the dried weight to reach the recognized commercial mass.
Transaction Basis
Verified results from this test provide the basis for contract fulfillment in greasy wool lots. Discrepancies between estimated and actual yield can lead to price adjustments or the rejection of entire containers at the receiving mill.
