What about indigo?

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Posted by Jeremy on September 7, 2001 at 22:53:37:

In reply to: Henna colour over previously dyed hair posted by Brandi on September 7, 2001 at 22:15:21:

: I used to be a licensed hairdresser until I developed an allergy to
: PPD, now I've changed careers. I was taught always to ask client
if
: he/she had henna in their hair because reactions could be
horrible.
: Is this true in the opposite case? My hair has been coloured with
a
: black chemical hairdye. If I want to put a black henna on top of
the
: chemical dye will disaster happen? The henna colour I found has no
: PPD in it.

Henna on chemically dyed hair is just as problematic as chemical dye
on previously henna'd hair.

However, "black henna" for hair without PPD might actually be indigo,
instead of henna. Can anyone comment on whether pure indigo has the
same reaction problems?

Having said that, there is a chance that there is also some henna in
the ingredients, so take care either way.

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: : I used to be a licensed hairdresser until I developed an allergy to : : PPD, now I've changed careers. I was taught always to ask client : if : : he/she had henna in their hair because reactions could be : horrible. : : Is this true in the opposite case? My hair has been coloured with : a : : black chemical hairdye. If I want to put a black henna on top of : the : : chemical dye will disaster happen? The henna colour I found has no : : PPD in it. : : Henna on chemically dyed hair is just as problematic as chemical dye : on previously henna'd hair. : : However, "black henna" for hair without PPD might actually be indigo, : instead of henna. Can anyone comment on whether pure indigo has the : same reaction problems? : : Having said that, there is a chance that there is also some henna in : the ingredients, so take care either way.
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