Abstract: According to the data of sample reflectance spectrum, chromaticity parameters and chromatic aberration (CMC) obtained by experiments, the paper researches the color changes influenced by fiber morphology, yarn winding time and yarn twist factor during the spinning process for the dope dyeing fibers. The results show that yarn winding time and twist factor have a great influence on the chromatic aberration of fiber and fiber assembly, but the fiber straightness has little effect. The chromatic aberration tends to decrease with the increase of yarn winding time. When the winding time reaches 125 s or more, the CMC chromatic aberration is less than 1. That is to say, the difference can’t be determined by the human eye.The sample reflectivity decreases with increasing yarn twist factor. When the difference of yarn twist factor is more than 30, the CMC chromatic aberration is more than 1. The analysis of the influencing factors of chromatic aberration will be helpful to the study of computer color matching model of colored fiber.

Key words: dope dyeing fiber; computer color matching; chromatic aberration; reflectance spectrum