Hello, I have been using henna powder to color my hair for a year now, but I'm tired of red tones. My hair are naturally blond and are now closed to something like warm auburn. How can I "light off" the red tones and come back to something more natural, like a medium brown for instance? And how long do I have to wait before using your product after my last henna? Thank you very much for your answer. Regards, Julie
