Quote:
Originally Posted by angelika13 
The only problem with Henna is that once you use it you can not dye over it until it grows out.
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I dyed over henna (and henned over dye) for years, because I wanted to get a brighter color, and never had any problems with my hair turning green or falling out or anything. Of course, then I read the website and realised that if I just used an acidic liquid instead of water, terped, and left the henna on longer I could get the color I wanted without all the extra bother of dye.
