The objectives of the study were to judge the light fastness of chosen normal dyes (madder, weld and woad) and effect of some widely used antioxidants and UV absorbers regarding light fastness of those dyes.
The photofading price curves of madder and weld fixed on cotton match kind II fading rate curves described by Giles. These answers are in concordance with those of Cox-Crews. The woad gift suggestions a type III fading price bend, similar to the indigo fading rate bend provided by Cox-Crews.
A poor light fastness for the three all-natural dyes when comparing to artificial ones is initiated beyond concern. Nevertheless, the application of some additives can enhance this default of natural dyes. In all the situations, the employment of Ultraviolet absorbers or anti-oxidants enhanced the light fastness of dyed textiles. Many effectives were the supplement C while the gallic acid.
- Light fastness;
- Ultraviolet absorbers;
- All-natural dyes