[pure-silver] Re: Adding Sodium Sulfite to Sodium Thiosufale.
- From: Bob Younger <ryounger@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Sun, 3 Apr 2011 06:28:11 -0700
Michael,
I've been using a water stop bath with Amidol. I agitate constantly in the
stop for 30 secs, then transfer to an alkaline fixer, with no hardener.
Admittedly, since my test prints are done exactly as my final prints, if
development is continuing at some reduced rate in the water stop bath then
I'm just taking that development into account in my end-to-end process. If I
use a water-bath development to adjust the contrast slightly, with no
agitation, then development certainly continues (at least that's what I plan
on). Are there some adverse effects of using the water stop bath I should be
aware of, on the lookout for?
Thanks,
Bob Younger
On Sun, Apr 3, 2011 at 06:16, Michael A. Smith and Paula Chamlee <
michaelandpaula@xxxxxxxxxxxxxxxxxxx> wrote:
> Ah, I did misread the 480. It was not sulfite, but thiosulfate.
>
> The developer I use is Amidol. Using a water bath as a stop bath is not an
> option, as Amidol is such a strong developer that development would
> continue.
>
> The Bisulfite makes the fixer slightly acidic, which, to my knowledge,
> insures that it keeps active throughout a printing session, which could
> involve sending 100 8x10 sheets though the first bath of 1/2 gallon of
> fixer. We have never had the fixer go bad during a printing session, and we
> always use the second fixer to make the first fixer. So, rather than the
> acid deteriorating the fixer, it seems to preserve it.
>
> In re-reading Richard's response, it would seem that for us at least, a
> slightly acidic fixer would be needed to insure neutralization of our very
> strong developer.
>
> Also, following what Brett did (the only photographer I have ever seen
> making a print), I put the print in the stop bath for only 10 or 15 seconds.
> Then into the fixer. After 30 seconds in the fixer I turn on the viewing
> light. Evaluate the print, and if it is a keeper, it goes back into the
> fixer for an additional 3 1/2 minutes, before going into the holding bath.
> The second fixer is for 4 minutes also.
>
> Michael A. Smith
>
>
>
>
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