It is recommended that the dyes used for color repair should have the following properties:
①Dyes will not become slow dyeing due to the influence of surfactants. When the color correction operation is carried out, a large amount of anionic surfactant contained in the dye remains in the dye solution, and a small amount of the color correction dye will form a slow dyeing effect due to the presence of the surfactant. Therefore, dyes for color repair must be selected that are not easily affected by surfactants and have a slow-dyeing effect.
② Stable dyes that are not easily affected by hydrolysis and reductive decomposition. Dyes for color repair, when used in very light-toned color repair, the dye is easily hydrolyzed or decomposed by reduction. Therefore, dyes that are not affected by these factors must be selected.
③Dyes with good levelling properties. Must have good level dyeing ability to obtain level dyeing effect.
④Dyes with excellent light fastness. The amount of dyes used for color correction is usually very small. Therefore, its sublimation fastness and wet fastness are very important, but not as urgent as the light fastness.
Generally, the dyes used for color repair are selected from the dyes used in the original dyeing formula. However, these dyes sometimes do not meet the above conditions. In this case, it is recommended to choose the following dyes suitable for color repair:
C.I (. Dye Index): Disperse Yellow 64; Disperse Red 60; Disperse Red 146; Disperse Violet 28; Disperse Violet 23; Disperse Blue 56.