From: Steve Bell (veracity000@earthlink.net)
Date: 12/13/02-06:35:51 PM Z
This is interesting.
when i first started trying gum, which was only about a month ago, i sized
and hardened a whole bunch of paper. i just used the last of it today and
the paper/size wasn't yellow at all. the paper was kept in my bathroom on a
shelf, so i'm not sure what conditions would have caused it not to yellow.
perplexing.
Steve
> [Original Message]
> From: Clay <wcharmon@wt.net>
> To: <alt-photo-process-l@sask.usask.ca>
> Date: 12/13/2002 7:02:53 PM
> Subject: More glyoxal hardener in gel sizing observations
>
>
> Just thought I would drop yet another bit of data to the glyoxal
> yellowing discussion. When I brought this up before, most list members
> indicated that prompt wet processing through the gum steps would keep
> the sizing from yellowing. That has indeed been my experience. I have
> had no subsequent yellowing as long as I do the rest of the gooey work
> promptly.
>
> Well, last weekend, I sized five prints that I had every intention of
> throwing the gum on in the next couple of days. Yeah, I know, five
> prints. I always super-size it. As could be predicted, real life
> intervened and I didn't get to them until today (Friday). The five
> prints had been in a stack in my darkroom, and the sizing on the one on
> top had already begun yellowing! Strangely, the ones beneath it were
> fine. So what I learned was: 1) size paper with glyoxal hardener pretty
> close to its actual anticipated use and 2) there must be some effect
> that unrestricted air circulation above the face of print accelerates
> the yellowing process.
>
> Two cents worth.
>
> Clay
--- Steve Bell
--- Veracity000@earthlink.net
--- "We have...become our own thought police; but instead of calling the
process by which we limit our own expression of
dissent and wonder 'censorship', we call it 'concern for commercial
viability'." -David Mamet
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