Re: Keratin binding

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Posted by Catherine Cartwright Jones on August 8, 2002 at 22:33:16:

In reply to: Keratin binding posted by Nick on August 8, 2002 at 21:50:52:

Indogols and lawsones bind to keratins by weak molecular bonds.
(possibly the hydrogen links on the keratin link to the same on the
lawsone, losing an H in the process .... but .... caveat the size of a
mastiff there) Indigols are larger than lawsones and therefore have
more difficulty penetrating skin cells.

When dyes don't bind ... they don't stay put. Know how your brand new
jeans blow off dye the first 10 washes? Those are indigols that are
just sitting on the fiber and haven't formed the molecular bond. Know
how after a while your jeans don't bleed but are still blue? Those
are the indigols that have that molecular bond.


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