Don't henna over dye

Posted by Catherine Cartwright Jones on November 17, 1999 at 02:00:21:

In Reply to: I wonder..... posted by Shel on November 16, 1999 at 22:52:11:

If you henna over dye, you get bizarre effects, black, green, high
wierdness, because henna reacts with the ammonia in the dyes, and if
hair is extremely porous from dyeing, the quinone part of the molecule
can produce greens and blues. The most unfortunate part is that the
high wierdness is very unpredictable!

Follow-ups:

• Except on the brush remnants Anon 04:05:37 11/17/99 (1)
  • Re:Don't dye over henna Maria 04:27:57 11/17/99 (0)