Ilford processing times (Pan F)

Discussion in 'Darkroom Developing and Printing' started by David Nebenzahl, Jul 21, 2010.

  1. After my recent success with TMX, I delved into my freezerful of film
    and pulled out a roll of Pan F I want to shoot. But I'm a bit mystified
    by the enclosed processing instructions.

    Was thinking of using D-76, and they have times for both this and ID-11
    (same times, since the same developer, except that they list ID-11 at
    1+1 but not D-76, though I assume I can also dilute it). But they show
    the same times for both ISO 25 and 50 exposure. Can this be correct?
    Other developers show different times for the two speeds.

    They also show times for Perceptol, but not Microdol-X. Richard K., you
    said these developers were equivalent: would you use the same times for
    both of these? The Humumgous Massive Really Really Big Dev Chart
    (http://www.digitaltruth.com/devchart.php) shows different times for
    these (9 min. for Perceptol vs 12 min. for Microdol; should I just use
    their recommendations?
     
    David Nebenzahl, Jul 21, 2010
    #1
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  2. On 7/22/2010 4:45 AM IanG spake thus:

    [corrected for top-posting, and WTF happened to my quoted text?]
    Thanks; I should have checked that first. As it turns out, the Ilford
    sheet agrees with the Massive Dev Chart.

    What it doesn't agree with is some of Ilford's own printed information:
    both the inside of the film carton and the large Ilford film processing
    chart I have (came with a box of paper, I think) have the same times for
    ISO 25 and 50 for three developers (ID-11, Microphen and D-76) which
    can't be correct. The PDF you gave us a link to appears to have the
    correct data. Must be typos, I guess.

    So now my only dilemma is whether I should de-rate the film at 25 or go
    for the extra stop (50) and develop longer (I plan on using Microdol-X).
    Any opinions on this?
     
    David Nebenzahl, Jul 22, 2010
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  3. [snip]

    Well, I for one very much appreciate, and have made much use of, your
    Humungous Ginormous Dev Chart. My hat is off to you.

    And as I pointed out in another post here, some of Ilford's own
    documentation has obviously erroneous data: both the inside of the film
    carton and the large Ilford Film Processing Chart that I have show
    identical (and therefore obviously incorrect) times for ISO 25 & 50
    times for three different developers for Pan F.

    Your chart agrees perfectly with the Ilford PDF supplied elsewhere in
    this thread, which appears to be correct.
     
    David Nebenzahl, Jul 22, 2010
    #3
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