Hennotannic acid is a dye. Lac paints are resin based.
Posted by Catherine Cartwright Jones on March 14, 2000 at 08:42:31:
In Reply to: it is hennatonic acid or some type of resin which stains skin? posted by atul mulay on March 14, 2000 at 08:10:54:
Hennotannic acid is not a resin. Lac is a resin. Entirely different
stuff. Temptu is based on resim, and many traditional body paints
from Bengal. India, and Nepal are lac (resin) based. You can suspend
all sorts of colors in lac, and it sticks to the skin really well. You
can formulate lac (resin) body paints to do body art that looks
exactly like a tattoo. It just sits on top of the skin. Henna is
totally different. Henna will penetrate down 20 cells deep into the
top dead layer of the skin.
Hennotannic acid is a very small tannin molecule that has the unusual
characteristic of entering and binding to collagen molecules (skin) at
body temperature and without a mordant. It releases dye and binds
best in an acidic environment.
Get your hands on some cosmetic chemistry textbooks, professional and
industrial cosmetic chemistry treatises. .... especially from the
hair dye industry. They worked out all the answers on henna a long
time ago. It's not very mysterious, really.
If you're looking for something that can be used in a pen on skin ....
henna isn't your answer. Look into something in resins, or a non-toxic
acrylic that will carry pigment and adhere firmly to the top of the
skin. And, if you can get a blue that will adhere nicely to the skin,
and is facile for drawing, ..... please us all know .... because there
is a vast market for something better than woad!
- I have find out a resin type liquid from henna how to make money out of it is question in front of me atul mulay 02:09:20 3/17/00
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