Studies ,1995 ;(9) .Р深色后,布面呈现明显染色条花。说明即使棉纤Р Test and Analysis on Maturity of Cotton FibreР Zhang Ye Cui Yumei Mu ZhengР Р (Xinjiang Industry Institute) (Xinjiang Textile Industry School)Р Abstract This paper deliberated the key action of cotton fibre maturity difference especially immatureР cotton fibre content on cotton fibre dyeability difference ,the micronaire value couldn’t reflect the maturity ofР cotton fibre bestly. This paper introduced the method on testing the targets of maturity and fineness of cottonР fibre and immature cotton fibre content with Uster Afis fibre testing system ,and discussed the relations beР tween immature cotton fibre content and yarn quality & dyeing behavior.Р Key Words Micronaire ,Circularity ,Fineness ,Immature Fibre Content ,Maturity ,Colour Difference