Because cassia is a natural plant powder, it does not contain harsh chemicals like ammonia or peroxide, making it a gentler option for many. However, bleached or heavily chemically treated hair is more porous and can absorb plant pigments and particles more intensely than untreated hair. This increased absorption can sometimes lead to unexpected tonal shifts, such as a stronger golden or yellow tint, on very light or bleached strands. To avoid surprises, it is wise to perform a strand test first. Apply a small amount of the prepared paste to a hidden section of hair and leave it on for the desired duration. This allows you to observe how your specific hair condition interacts with the cassia before committing to a full head application. If you have a sensitive scalp or are currently using other coloring products, checking compatibility beforehand is also advisable.
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