[pure-silver] Re: Old Paper Developer Question
- From: Don Sweet <don@xxxxxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Tue, 19 Feb 2008 11:11:37 +1300
Thanks to everyone for those helpful replies.
It looks as if amidol will be more trouble than it is worth. Chlorohydroquinone
seems ideal, if any can be found at a reasonable price (and perhaps it needs
hazmats shipping).
Might glycin be the next best option?
Bob are there any risks or hazards with the fix - bleach - fix process? I am
intrigued by your reference to the different purpose served by benzotriazole.
Regards
Don Sweet
----- Original Message -----
From: BOB KISS
To: pure-silver@xxxxxxxxxxxxx
Sent: Tuesday, February 19, 2008 4:22 AM
Subject: [pure-silver] Re: Old Paper Developer Question
DEAR DON,
A few suggestions:
1) Yes, I have discovered that old papers seem to exhibit less fog with
the same degree of development in the Formulary 130 developer (glycin, metol,
hq) than in dektol.
2) The trick is to develop just the right amount of time. This is when
the D-Log E curves are as steep as they will get. After this time the curves
remain at the same steepness (contrast) and the speed of the paper increases
but, more importantly, so will the fog.which you don't want.
3) I have found that Benzotriazole can help some but Richard Knoppow
will rightly say that it has a different purpose.
4) What I have found to work beautifully was a very mild bleach
following the first fixer to clean up the whites, a rinse, then the second fix
and then the usual remaining hypoclear, toning, washing procedure.
5) It is very important to make your test strips and test prints
carrying them ALL THE WAY through the process including using Ansel's trick of
drying the tests in a microwave oven. Judge them dry.then you will know what
your results will really be otherwise both the bleaching and toning will give
you final results VERY different than what you see after the first fix. In the
long run you save more paper and time taking these precautions.
CHEERS!
BOB
------------------------------------------------------------------------------
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Don Sweet
Sent: Monday, February 18, 2008 1:13 AM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Old Paper Developer Question
I have few boxes of 25+ year old enlarging paper, including Ilfobrom and
Portriga Rapid. It is unopened, so I decided before blazing away I should look
for some information about how to best to process it, particularly to minimise
fog. First I sourced some benzotriazole which I thought could just be added to
Dektol or Neutol or Bromophen developer.
Then following links from the UnblinkingEye website I found some suggestions
that both amidol-based or glycin-based developers are more resistant to fog
than the usual MQ or PQ blends. Does anyone know if that is right, and whether
either of them is likely to be a better developer for my old paper?
Thanks
Don Sweet
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