What should I consider before using Fitocolor 9.1, especially if my hair is damaged or my scalp is sensitive?

Before applying Fitocolor 9.1, perform a patch test on a small area of skin, such as behind the ear, and a strand test on an inconspicuous lock of hair. The patch test checks for potential irritation or allergic reactions, which are more likely when the scalp is sensitive or the hair cuticle has been compromised by previous lightening treatments. The strand test lets you see how the ash‑toned pigment interacts with your natural color and porosity, giving you a realistic preview of the final result. If your hair is very damaged, the cuticle may be overly porous, causing the dye to absorb faster and potentially produce an uneven or overly intense shade. In such cases, a strand test also helps determine the optimal processing time to avoid over‑coloring. After the test, follow the package instructions precisely regarding mixing ratios, application time, and rinsing. The final appearance of shade 9.1 can vary widely depending on your starting color, the level of pre‑lightening, and any previous dye products used. The ".1" indicates an ash direction, which is intended to neutralize brassiness and create a cooler blonde. However, if your natural base is very warm or if you have residual pigments from earlier colors, the ash may interact in unexpected ways, leading to a result that is not exactly the intended cool blonde. Realistic expectations are key: the product is best suited for those with naturally light or pre‑lightened hair seeking a refined blonde rather than a golden tone. By conducting the tests and reading the instructions, you minimize the risk of irritation and achieve a more predictable outcome.