[pure-silver] Re: Old Paper Developer Question

There was a dicussion here on old Pure Silver about using a very dilute bleach 
prior to processing the print in teh developer. I recall about a 1:100 dilution 
of Part A Kodak Sepia toner of the old formula. Of course, it would take some 
testing to get the right bleaching to brighten without lossing detail in the 
highlights. 

Does anybody else recall this? 

Eric Neilsen Photography
4101 Commerce Street, Suite 9
Dallas, TX 75226
214-827-8301
http://www.ericneilsenphotography.com

  ----- Original Message ----- 
  From: BOB KISS 
  To: pure-silver@xxxxxxxxxxxxx 
  Sent: Monday, February 18, 2008 9:22 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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