[pure-silver] Re: Yellow edges
- From: Ray Rogers <earthsoda@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Thu, 26 May 2005 00:13:57 -0700 (PDT)
--- Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:
Old handbooks often give very long times for fixing,
on the order of 15 or 20 minutes for both film and
paper. I think there are two reasons for
this.
One was to try to insure complete fixing where
slopping processing practice was used.
The other reason is perhaps more obscure:
> it is to insure complete _hardening_.
Richard,
I think it might be possible that at least in some
cases, thicker gelatin layers and or higher iodide
content may have played some part in this.
The first PRINT FILM I made required greater than what
we now call normal fixing times. There are several
factors involved and without knowing certain parameter
details, I don't think it is really possible to state
authoratitatively which factors were the main ones at
work.
Ray
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