A national norm for the count variation of yarn produced in Sri Lanka

Abstract

This project is aimed at establishing a National norm for the count variation of yarns produced in Sri Lankan mills. Owing to , ( a ) its simplicity (b) its ease of understanding by most mill personnel ( c ) the possibility of making some international comparisons on National norms and (d) the ease by which data can be collected , the Percentage Mean Range CPMR) method of measuring count variation has been used in this project . The results of this project have indicated that the average count variation of Sri Lankan spun carded cotton yarns are very much greater than ( worse than ) the world average value given under USTER STATISTICS 1982.