a process for producing dyed spun cotton yarns having a reduced number of irregularities and increased luster is described . the process involves dyeing at least a portion of the cotton fibers which are to form the yarn , then combing the dyed fibers subsequent to the dyeing process . the dyed and combed fibers are then optionally blended with fibers having a visually distinct appearance , and spun into a yarn using conventional spinning methods . the resulting yarns having a dramatically reduced number of thick and thin places and improved yarn properties including improved luster and hand . furthermore , when the thus - dyed fibers are blended with differently - colored fibers prior to the combing operation , the resultant yarns match the visual colors of like - colored yarns produced by conventional processes , while the color is more intimately blended and the yarns have a markedly increased uniformity , luster and tenacity . as a result , fabrics produced from the yarns have a superior appearance with respect to color blend and luster , and the number of neps and irregularities are dramatically reduced with respect to those of conventionally - produced fabrics .