Abstract
To improve the dyeability and colorfastness of cotton and silk fabric dyed with natural dye of safflower, cotton and silk fabrics were pre-treated with different mordants such as halliic-acid, alum, brine and tannic-acid. Also, to investigate the effect of finishing treatment of fabrics on dyeability, cotton was treated with chitosan and mercerized before dyeing. L, a, b, ΔE and colorfastness(light, Laundry, sweat) of each samples were measured and compared. Mordant treatment didn't improved significantly dyeability and colorfastness on cotton and silk. But, on cotton mercerization and chitosan treatment improved dyeability and colorfastness. To compare the efficiency of extracted dye and Powered dye, extracted red dye of safflower prepared as powder. Cotton and silk were dyed with dyeing solution which made with powdered dye according to different concentration. Efficiency of powdered dye was found out lower than extracted dye solution.