Comparative study of different test methods used for the measurement of physical properties of cotton

Abstract

Ten cotton varieties/hybrids with varying properties, such as 2.5% span length measured by HVI, AFIS & Baer Sorter; bundle strength at 3.2mm measured by HVI and Stellometer; and linear density measured by AFIS, HVI and Gravimetric method, have been studied. Maturities are also compared between AFIS and caustic soda methods. In addition, short fibre content measured by HVI, Baer Sorter and AFIS are also compared. Results show that AFIS values may be considered more realistic for length parameters, viz. 2.5% span length and short fibre content, as compared to HVI values. However, the linear density as measured by AFIS is not correct. Micronaire value (micrograms/inch) from HVI agrees quite well with the gravimetric linear density. Maturity value as measured by AFIS does not agree with the percentage maturity determined using caustic soda method.