Method and device for measuring the equal to the dye uptake of a liquid maes to examiners yarn

摘要

Yarn is continuously supplied to a measuring system with an applied twist of at least 100 turns per meter. A beam having a continuous spectrum from the visible region to the near-infrared region is impinged upon the yarn and measurements are taken on the beams reflected from the yarn. The refected beams are divided into two parts. The characteristics of the near-infrared region are applied to one part, and luminosity characteristics are applied to the other. The ratio of intensity of the former to that of the latter is determined. This ratio corresponds to the uniformity of physical characteristics in the direction of the length of the yarn.