Influence of fixation and iron mordanting on color stability of silk fabric dyed with natural dye hematoxylin

The color stability of tussah silk fabrics which were dyed with natural dye hematoxylin using iron mordant dyeing and fixing treatment was studied by testing the color indexes and color fastness of the dyed silk fabric.It was found that the color and color stability of the dyed fabric were influenced by both the mordant dyeing and color fixation;the color stability of the dyed fabric in aqueous solution at different pH values could be improved by color fixation;iron mordant dyeing significantly improved the color fastness to washing,but color stability,of the dyed fabric;except under high temperature conditions,iron mordant dyeing and color fixation treatment enhanced both the color fastness to light and color fastness to peroxide bleaching of the silk fabric dyed with hematoxylin;and color fixation made the dyed fabric more brilliant.