How to develop photagraphic b/w paper in 45 seconds?

Discussion in 'Darkroom Developing and Printing' started by Victor E. Falkteg, Jul 19, 2003.

  1. Hi,

    Maybe somebody knows how to develop photpgraphic paper (black and white, RC)
    to get an optimal developing time of 45 seconds?
    I would like to have the same developing times for black and white as for
    the RA-4 process. It would be nice and would make the lab work more
    efficient.
    I use one Nova tank for RA-4 and got another one (three slots with heaters)
    that I would like to use for b/w. The temperature can be up to over 40
    degrees centigrade ( 104 degrees F) without any problems, but does anybody
    know if the chemistry for black and white funktions at such temperatures and
    what the developing time should be to get a time of 45 seconds?
    Is it possible to fix a b/w in 45 secunds at higher temperatures?

    It would be nice to be able to use exactly the same routines for b/w as for
    RA-4.

    Many thanks and regards

    Victor E Falkteg
     
    Victor E. Falkteg, Jul 19, 2003
    #1
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  2. Victor E. Falkteg

    Wim Guest

    Hydroquinone developers (most of them contain Hydroquinone) get
    contrastier when developed at higher temperatures. Papers has to
    develop completely (unlike film). Best is to test for yourself.

    Higher concentration of the developer can help too. Why don't you
    simply try ?
    Higher concentration of fixer (filmstrenght) should be more effective.
    I guess that higher temperature doesn't do any harm to speed uop the
    process. Here too, a simple test tells you everything.
     
    Wim, Jul 19, 2003
    #2
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  3. IIRC, chloride papers develop faster than bromide papers. So you might
    wish to try AZO paper.
     
    Jean-David Beyer, Jul 19, 2003
    #3
  4. Victor E. Falkteg

    Nick Zentena Guest

    I think some of the Agfa developers are pretty close to that. 60 seconds
    including a 10 second drain time.


    Nick
     
    Nick Zentena, Jul 19, 2003
    #4
  5. Victor E. Falkteg

    John Guest

    Dektol straight.

    John
     
    John, Jul 19, 2003
    #5
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