56—The Photoelectric Measurement of the Irregularity and the Hairiness of Worsted Yarn

Abstract
The effect of the surface hairs upon the measurement of yarn irregularity and diameter by a photometer has been studied. The increase in the measured variation, due to this cause, depends upon the width of the photometer aperture. The effect of surface hairs upon the mean diameter of a worsted yarn measured photometrically may be used to assess the degree of hairiness quantitatively.

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