Changes in Color of Dyed Cotton Cloths by JIS Washing Fastness Test and Multi-Cycle Machine Wash Test

SHIRAIWA Harumi

doi:10.11428/jhej1951.35.538

Investigation was made concerning the effect of various types of detergents on the color of dyed cotton cloths, by the JIS washing fastness test using the Launder-O meter and also by the multi cycle machine wash test using the Terg-O-To meter. The relationship between these two tests was examined.<BR>1. With direct dyed cotton cloths, a good correlation was observed between the two test methods. In the JIS test, aftertreatment with cationic fixative was found to improve washing fastness. In the multi-cycle machine wash test, on the other hand, a greater change in color was noted when a color change had already been effected by aftertreatment, probably due to desorption of fixative by repeated washing. Thus in some cases the extent of color change in after treated cloths was greater than that in untreated ones.<BR>2. In some cases involving reactive dyed cloths, color change due to abrasion was observed in the multi-cycle machine wash test using heavy duty synthetic detergents, especially the liquid type. The JIS test did not bring about this phenomenon.<BR>3. Using indigo dye, color change by the multi-cycle machine wash test was far greater than that by the JIS test because the mechanical action during washing tends to remove dye from the fiber.

Changes in Color of Dyed Cotton Cloths by JIS Washing Fastness Test and Multi-Cycle Machine Wash Test

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