Judy Seigel (jseigel@panix.com)
Mon, 01 Nov 1999 22:57:40 -0500 (EST)
On Mon, 1 Nov 1999 FotoDave@aol.com wrote:
> The cases that I have seen were gum arabic rather than gelatin, but I am sure
> the organisms (and large organisms too like cockroaches) love jello as well
> as gum drops.
However, it should be pointed out that the gum arabic in a gum print is
hardened by the action of the dichromate, which has a tanning effect. It
might have some effect on the gelatin, too, but not in the parts where
there's no tanning -- that is, on the highlights.
> Oh, what does this have to do with alt. photo? I guess my suggestion is to
> harden your gelatin. I have read some photo/darkroom books in which the
> authors say that if you are using rotary processing (instead of manual/tray)
> to process your film, there is really *no* reason to harden the gelatin
> because you can't scratch it. I guess the authors didn't realize that damage
> to gelatin can occur not only during wet processing but can also occur later,
> maybe even years later ....
You maybe don't scratch it during processing, maybe or maybe not so
readily in a 35 mm tank either -- however just pulling it in and out of a
sleeve with a microspeck of grit on it can make a dandy scratch -- not to
mention moisture, splashes, wet emulsion, all the other ills film is heir
to.
Judy
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| Judy Seigel, Editor >
| World Journal of Post-Factory Photography > "HOW-TO and WHY"
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| <http://rmp.opusis.com/postfactory/postfactory.html>
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