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Posted by BimboGeri on August 28, 2001 at 19:32:22:

In reply to: Re: Shelly... posted by Nick on August 28, 2001 at 16:29:08:

The test we're trying to use is a chromatography test. As far as we
know, although we need to check, probably with natural expressions
black, PPD henna will only make a black mark in the experiment,
whereas henna and other safe dyes split into the colours it's made
from. EG; a henna spot is greenish brown in the middle, and orange on
the outside

 


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