My hair is light, bleached, or previously dyed — can I use this Pink Red shade safely?

Herbal colour behaves unpredictably on very light, heavily bleached, or recently dyed hair. Because the pigments coat the surface rather than penetrate evenly, porous areas can grab more colour, leading to a brighter or more intense result than expected. The manufacturer explicitly recommends doing a strand test first: mix a small amount of powder with water, apply to a hidden section, leave for the intended processing time, then rinse and dry to see the true tone. This also reveals how the shade interacts with any residual oxidative dye. Additionally, a patch test on the inner forearm or behind the ear 48 hours before full use is wise, especially if your scalp is sensitive or you have reacted to hair products in the past. If the strand test shows an undesirable tone, you can adjust the mix (e.g., shorter processing time, blending with a neutral henna) or choose a different shade.