[pure-silver] Re: Non-acid rapid fixer - continued
- From: Jean-David Beyer <jeandavid8@xxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Mon, 22 Feb 2010 09:59:46 -0500
Claudio Bonavolta wrote:
I'm not using the Ilford short-fix scheme: with a washaid, there is
little to gain in terms of wash time.
The idea was not to save wash time, but to shorten fix time so that the
fiber base and baryta substrate would not be impregnated with fixer and
its byproducts. The reason for that is that if you fix longer, you will
never get all that stuff out of those deeper layers of the paper.
Now more recent research has indicated that it is not necessary to get
all the fixer out of the paper, that minute amounts actually seem to
protect the image.
But, after your post, I wanted to try a 1 minute fix time (I doubt the
30 seconds will be enough but should try one day).
As to be close to a worst-case scenario, the fix was already largely
used (iodide test showed a consistent cloudiness), I processed a
non-exposed print (Ilford Multigrade IV fiber), carefully washed the
sample and did a test with the selenium test.
Looks like the F-9-like fixer is still pretty active as the selenium
test was ok ...
Claudio Bonavolta
http://www.bonavolta.ch
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