Re: henna and food coloring

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Posted by Catherine Cartwright Jones on June 23, 2002 at 13:43:32:

In reply to: henna and food coloring posted by tiffany on June 22, 2002 at 16:32:27:

: Hey people i was wondering what would happen if i mixed food color
: with my henna mix?

Food coloring has molecules that are, generally, speaking, too large
to penetrate the skin to much depth. You might get some slight
alteration for the first day or two, but then nothing, sorta like
playing with Koolaid powder. They stain clothing like crazy, but
donīt stain skin particularly well.

Dye molecules are often very large. The henna dye molecule is very
unusual in that it is an appropriate size to penetrate skin cells and
an appropriate shape to bind with keratin. Food dyes are larger.
The indigo molecule is about twice the size of a henna molecule,
which is why you can get a stain with indigo, but it doesnīt last as
long as henna. If the food color stains worked easily and lasted a
long time, weīd all be multicolor. The "colored henna" use something
like food coloring, but they donīt last very long. You can paint on
yourself with straight food coloring, or with the concentrates used
for candy, but you really donīt get any worthwhile results. One
wash ..... gone.

Coal tar dyes (ppds) ( NOT food coloring!!!) have tiny molecules and
will cruise right into your skin, but theyīre powerful sensitizers,
and break down into substances in your body that can cause tissue
necrosis .... nasty, nasty, nasty business!


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