67—THE EFFECT OF STAPLE STRENGTH ON CARDING AND COMBING

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Abstract
A trial was carried out on the effect of various levels of staple strength on the manufacturing performance, up to tops, of 48/50s New Zealand Romney crossbred wool. The sourider wools gave the highest Noble combing tears, less fibre breakage in carding and combing, and longer squarer tops. A tear of 59/1 was obtained for the soundest wool. Wool with a tender region onethird of the staple length up from the butt gave a shorter top and longer noil than wool in which the tender region was closer to the staple butt. The effect of very short fibre on the measurement of mean fibre length and, consequently, on the estimation of fibre breakage is discussed.

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