A Measure of the Variation in Blend Proportions Along Blended Yarns and its Relation to the Number of Doublings Used in Processing

Abstract

Measurements of short-term variations in blend proportions along the length of a yarn are compared with the variations predicted theoretically. For few doublings the ob served variation is found to be greater than the theoretical variation. The results are used to express, as an equivalent number of doublings, the action of the card on this variation in blend proportion.