[pure-silver] Re: Update: .... Re: Problem with 2 tray hypo (fixer).
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Wed, 16 Dec 2009 19:21:12 -0800
----- Original Message -----
From: "Bogdan Karasek" <bkarasek@xxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Wednesday, December 16, 2009 3:32 PM
Subject: [pure-silver] Update: .... Re: Problem with 2 tray
hypo (fixer).
Hi all,
Still a mystery but I followed up on several suggestions.
First off, I took the last two prints that went through
the soup and pulled at random 5 more out the the 30 8x10's
that went through. I then tested using a 1:9 solution of
Selenium, 2-3 drops on the border of each print... 3-4
minute wait, no staining. Paper is perfectly clear, you
can't tell where the drops of KRST were. So I assume that
Fixer I, and Fixer II, despite its amber colour, did
their work and are not exhausted.
To facilitate the KRST test at the end of a printing run,
I made a small solution to fit into a clean ink bottle and
got several syringes from the pharmacy to distribute the
drops. Question is, how long can the solution keep like
that? Should it maybe be stored a a brown lab bottle?
The other thing that I did was to buy 6 gallons of
domestic bleach and poured the stuff into the two fixer,
stop, and 2 developer trays.
So no closer to an explanation.
And a big thanks to all who helped out.
Cheers,
Bogdan
The KRST test solution has an indefinite life.
Eventually, the thiosulfate in it probably oxidizes but the
same thing as a toner will keep for months if not years if
kept in a sealed bottle. I don't think its light sensitive.
As long as its used on washed prints or film its reliable.
If there is a lot of thiosulfate in the emulsion it may not
stain even if there is also residual silver. I think this is
the reason Kodak stopped recommending the test.
--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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