Study of fixation of natural dyes extract from safflower and cucumin onto cotton fabric by using cross-linking agent was carried out. The dye extracts were applied onto cotton fabric using padding technique and the fixation were performed in hot air oven at temperature between 160-180 ํC for 3 minutes. Due to insolubility of curcumin in cross-linking agent solution, suitable dyeing process for curcumin was required two steps; dyeing and then crosslinker fixation. While suitable dyeing process for safflower was all -in-one method. 2-phosphono-butane-1,2,4-tricarboxylic acid and sodium hypophosphite, as a catalyst underwent crosslinking reaction with cellulose at high temperature treatment. The cross-linking agent was capable of forming cross-linked network with cellulose. As a result, the cross-link acted as a barrier preventing the dye molecule to diffuse out during washing. The results, showed that significant improvement in washing fastness could be achieved comparable to conventional method like mordant fixation. From this study, suitable fixation temperature was 175 ํC in 3 minutes.
