Judy Seigel (jseigel@panix.com)
Thu, 25 Nov 1999 14:03:54 -0500 (EST)
On Thu, 25 Nov 1999, Jeffrey D. Mathias wrote:
> I am puzzled how this can not just be a Gum print without a transfer as
> I had thought the major difference between Gum and Carbon was in the
> removal of the unexposed gelatin/pigment (from surface with Carbon and
> from underneath for Gum), unless it is molded as with a Woodburytype.
What gum and carbon have in common is that the hardening agent is a
dichromate and the color is (often) pigment. The differences are
everything else, including that gum arabic and gelatin are entirely
different animals, so to speak. However, if anyone is removing unexposed
pigment from *underneath* in gum, I hope they'll share...
Judy
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| World Journal of Post-Factory Photography > "HOW-TO and WHY"
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