Title: Not effective on black hair
Review: I purchased this to dye my black eyebrows, hoping it would turn medium brown, or at least dark brown. I followed the instructions and left it in for 5-7 minutes. I didn't show any difference, so I tried again and same happened. I have sensitive skin so it irritated. On the plus side, it was easy to mix. It would probably work for blond eyebrows.
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