Paterson Photocolor RA-4 processing times

Discussion in 'Darkroom Developing and Printing' started by Ed Berger, Nov 3, 2003.

  1. Ed Berger

    Ed Berger Guest

    Can anyone tell me the recommended times for the developer diluted 1:4
    at various room temperatures? This information seems to be behind the
    label which became unreadable when I tried to remove it. It doesn't
    seem to be on the Paterson website either. Thanks in advance,

    Ed Berger, Nov 3, 2003
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  2. Ed Berger

    Frank Guest

    Frank, Nov 3, 2003
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  3. Ed Berger

    Ed Berger Guest

    Frank, seems to list only film/developer combinations. I'm
    looking for RA-4 color print developer times. Or am I missing

    Ed Berger, Nov 3, 2003
  4. Color prints develop to completion. At 95 degrees F, it takes about
    one minute. More at a lower temperature, less at a higher temperature.
    Try it out. Develop identically exposed prints for 45, 60, 75 and 90
    seconds. There should be little difference in the 60-75 second ones,
    maybe a little darkening in the 90 second one.

    Francis A. Miniter
    Francis A. Miniter, Nov 3, 2003
  5. Ed Berger

    Frank Guest


    Sorry about that! RA 4....Here is what UNICOLOR recommends for its RA 4
    Developer 75F (24C) 3 min, 20 sec.
    Blix 1 min. 30 sec
    Wash 1.5-2.5 min. @ 75~110F

    Dev. 80F 2 min 25 sec.
    Blix 1 min, 30 sec
    Wash is same

    Dev, 85F 1 min, 40 sec
    Blix 1 min
    Wash is same.

    This is for UNICOLOR (uniprint)

    May be worth a try? Let me know if it works out for you. I tend to
    think they would all be about the same.

    Frank, Nov 4, 2003
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