Can I use this product if my hair was recently dyed or bleached with chemical colour?

Chemical dyes and bleach alter the hair's porosity and cuticle structure, often making it more absorbent in some areas and resistant in others. When herbal pigments coat this uneven surface, they may grab too intensely on over-porous sections (turning nearly black or greenish) and barely deposit on resistant zones, leading to a patchy result. Bleached hair is especially prone to pulling unwanted blue-green tones from indigo because the warm undertones that normally balance it have been removed. The source material advises extra caution and a strand test if hair is "very light, heavily processed, or recently coloured with chemical dye." A practical approach: wait at least 10–14 days after your last chemical service, wash the hair a few times to remove residual oxidative agents, then do a strand test on a discreet section. If the test looks even and the shade is acceptable, proceed with full application. If not, consider a professional colour correction before using herbal dyes.