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Predicting the yield of raw wool from its density under pressure

Wyoming Experiment Station

Abstract

In the 1930 proceedings of this Society, Burns¹ presented a paper on shrinkage determination which pointed out the importance of shrinkage to the wool trade and to the range sheepman. Actually, however, the converse of shrinkage, namely, the yield of clean wool, is the important factor. The yield is defined as the percentage of clean wool left in a lot after scouring.

A quick method for determining the yield of raw wool at the shearing shed would be of great value to the producer as well as to the buyer and no doubt would enable them to come to a trading basis much sooner than under the present system. Scouring samples or lots is out of the question for such a quick determination. The Wyoming Experiment Station has long been aware of the desirability of finding such a method and was consequently very much interested in the work of the Bureau of Animal Industry reported by Hardy².