Re: the 48 hour thing - a ccj question me thinks

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Posted by Catherine Cartwright Jones on July 13, 2002 at 21:48:46:

In reply to: the 48 hour thing - a ccj question me thinks posted by samantha on July 13, 2002 at 20:53:13:

Glad you got good weather! Hereabouts it's 32C - 37C daily highs, (90F
- 100F) so am looking forward to 2 weeks great henna weather at
Brushwood! I hope to take lots of picx this time!

As far as I can figure out, it is an oxidation process, rather like a
cut apple darkening with contact with air. It happens faster and more
completely in heat, and more slowly and less completely in cool.
Indigo oxidizes to come to color, and a few other dyes do too. I
think what we're seeing is hydrogens getting ripped off the lawsone
molecule, facilitated by the monoterpene alcohols, or heat, or an
alkali ....... but I'm not a chemist, so I'm only responding according
to my own understanding.


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