Whoops! Shot HP5+ at 64!

Discussion in 'B&W: Film, Paper, Chemistry' started by sienarot, Dec 16, 2007.

  1. sienarot

    sienarot Member

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    I accidently shot some HP5 at ISO 64, thinking it was another film. Anyone have any tips on pulling this 2.5 stops? There's nothing on the massive dev chart, atleast not with the chemicals I have on hand (Rodinal, Ilfosol, and the last of my D76). I understand pulling it is going to give me really low contrast negs. Should I just live with it, or might it be an idea to develop in a diluted solution to get out some shadow detail, then switch to a higher concentration mid way?
     
  2. Steve Smith

    Steve Smith Subscriber

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  3. Jean Noire

    Jean Noire Member

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    l have no experience of using HP5 as yet but with my setup I have little difficulty in pulling tri-x 1 1/2 to 2 stops and compensate in printing. My specific times and materials would be of little use to you.
    You could also consider overdevelopment rather than under by about 30%. This will give a dense neg but more even contrast although printing times may be longer.

    Regards,
    John.
     
  4. pentaxuser

    pentaxuser Subscriber

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    It is said that B&W is tolerant of 2 to 3 stops of overexposure anyway. Combine that with a speed reducing dev such as Perceptol which brings HP5+ down to EI 200 and in theory you're in with a fighting chance of producing reasonable negs which will be printable.

    Best of luck. If you have ever considered posting to the technical gallery, it would be nice to see how the negs print.

    pentaxuser
     
  5. kevcurry67

    kevcurry67 Member

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    For HP5+@320... My Personal Normal(N) Dev time for ID11/D76 Dilution 1:1@20C is 9min. My 2 stop contraction Dev time(N-2) is 5.5min. You'll probably be somewhere around here but what you do is really at best a guess. The Subject Brightness Range(SBR) of the original scene will play the determining part ie if it was a scene that had bright highlights they will most likely be blown out, but the contraction of development will help a bit. If it was a Flat low contrast scene you will most likely end up a flat negative. Higher grade printing might help here.

    Good luck
    kev
     
  6. David William White

    David William White Member

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    Sounds like this is your first time overexposing by two stops or more. If it's not a paying job, why not just developed normally? If you are lucky, you had some high contrast scenes and some low contrast scenes. Might learn something to keep up your sleeve.
     
  7. Andrew Moxom

    Andrew Moxom Member

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    What about using Diafine?
     
  8. Bob Carnie

    Bob Carnie Subscriber

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    PMK drop two stops in time and you should be a ok.

    Lots of clients rate HP5 at 100 and drop process with me, you may really really like this film combo.
     
  9. fschifano

    fschifano Member

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    Diafine works well as a compensating developer. It will also deliver a speed boost of about 1 stop with HP5+, which is exactly what the OP doesn't need. I thinks something like full strength Perceptol or Microdol-X, along with a reduction in development time, is your best bet.
     
  10. sienarot

    sienarot Member

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    Thanks for all the suggestions everyone! I ended up developing the film at 200 and following the massive dev chart's numbers on rodinal (1:25 @ 4m45s). The fact that the scene was very contrasty helped too, I think.

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