22—ASSESSMENT OF BLENDING TECHNIQUES IN WORSTED-YARN PRODUCTION PART II: MEASUREMENT OF STREAKINESS

An account is given of the development of a technique for the assessment of the streakiness of fabrics knitted from worsted blended-fibre yarns in which the fibres constituting the blend are of different colours. A filter colorimeter was used for the tests, and an account is given of trials made to determine the optimum conditions for it. The results of tests made with the instrument are compared with visual assessments of the streakiness of knitted fabrics, and it is shown that only when the fabrics were of a similar degree of streakiness and the judges were unable to distinguish between them was the correlation between the subjective and objective methods of assessment low. It is concluded that the instrumental technique possesses distinct possibilities for application to the evaluation of the streakiness of colour-mixture yams and of fabrics made of them.