Re: Henna chemistry (green?!)
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Posted by Anon on September 07, 1999 at 13:49:17:
In Reply to: Henna chemistry posted by Catherine Cartwright Jones on September 07, 1999 at 02:08:29:
: It also explains why hennaeing over bleached hair makes it a vivid : green.....it has to do with a blue dye part of the quinone that : normally doesn't penetrate, but will dive right into very porous : bleached hair and make it vivid green. Whoa...neat! I suspect if there were a safe way to make the blue/green on skin, it would have been found by now. Which brings up a question. I've been doing side-by-side tests on my soles, and one of them had some lasting dull green, much like the paste color upon application (before it turns black). It's orange-red around the edges and on the skin ridges, so at first I thought I just hadn't gotten all the paste off the skin (maybe some stuck in the footprint grooves). But...well, I scrubbed, and it's still vaguely dull green though it's been at least 2 weeks and most of the rest of the tests have faded. Anyone ever have this happen? Details: simple henna-water mixture, put on kinda thick in solid areas, lemon-sugar on top. I only left it on a few hours, but didn't really do a thorough scraping afterward, so some henna may have remained overnight. I did 6 patches (2 each of 3 different henna samples), and only one, to the side of my arch, had this greenish effect. I'd been doing various experiments on the same foot the previous month, but nothing particularly unusual or destructive - not even the ammonia thing. -Anon
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