a window in the oxidation process

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Posted by Catherine Cartwright Jones on July 23, 2001 at 22:53:14:

In reply to: We Have Nuclear Power! but what if I just want fireworks? posted by Lauren on July 23, 2001 at 20:40:20:

Any time henna oxidizes, it will oxidize to dark. All these mixes
have a 24 hour window during wich the color goes from orange to RED to
burgundy, then oxidizes on to the darker colors. On the way to DARK,
you cruise by some absolutely amazing burgundies... or at least we did
at Sirius.

I'm working on exactly what that oxidation process is ... which
valence bonds are being broken exactly WHEN. When I understand that,
perhaps I can figure out how to have a longer red period.

However .... if it doesn't go beyond red, it WILL drop to orange on
the fade-down. Which trade-off do you want?

Or, for REAL Indian screaming red, go to vermillion or lac. At
Sirius, one lurker brought in her "henna stamps" from India (she was
teaching dance classes on classic Indian dance) She wanted help
figuring out how to use them ... and we got the most spectacular reds
mixing vermillion powder with water and stamping hands and other
parts of the body. That's the powder used to make the part of the hair
red, the red dot between the eyebrows. It's fragrant ... and clings
to the skin. We tried it as lipstick (lovely!) and to re-create the
shaded brilliant reds and feet seen on Indian women's hands (10th
to 18th centuries) (most of those reds in the pix do not actually
represent henna ... but are lac and vermillion!).

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: Any time henna oxidizes, it will oxidize to dark. All these mixes : have a 24 hour window during wich the color goes from orange to RED to : burgundy, then oxidizes on to the darker colors. On the way to DARK, : you cruise by some absolutely amazing burgundies... or at least we did : at Sirius. : : I'm working on exactly what that oxidation process is ... which : valence bonds are being broken exactly WHEN. When I understand that, : perhaps I can figure out how to have a longer red period. : : However .... if it doesn't go beyond red, it WILL drop to orange on : the fade-down. Which trade-off do you want? : : Or, for REAL Indian screaming red, go to vermillion or lac. At : Sirius, one lurker brought in her "henna stamps" from India (she was : teaching dance classes on classic Indian dance) She wanted help : figuring out how to use them ... and we got the most spectacular reds : mixing vermillion powder with water and stamping hands and other : parts of the body. That's the powder used to make the part of the hair : red, the red dot between the eyebrows. It's fragrant ... and clings : to the skin. We tried it as lipstick (lovely!) and to re-create the : shaded brilliant reds and feet seen on Indian women's hands (10th : to 18th centuries) (most of those reds in the pix do not actually : represent henna ... but are lac and vermillion!).
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