Processing Tmax 400

Discussion in 'B&W: Film, Paper, Chemistry' started by Bruce Osgood, Feb 19, 2004.

  1. Bruce Osgood

    Bruce Osgood Membership Council Council

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    I had setteled on Pan F+ in Rodinal 1:50 processed in a Jobo as my primary film/developer combination.

    This long gray winter is getting me down to the point where I'd like to try Tmax 400 in D-76H (1+1) with the Jobo/rotary machine.

    Any suggestions on a starting point for processing time ?
     
  2. Jorge

    Jorge Inactive

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    8 minutes at 70 degrees for a density range of 1.05 with a film speed of 250.

    Good luck.
     
  3. Bruce Osgood

    Bruce Osgood Membership Council Council

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    Now that's an answer I like - no ambiquities, no hesitation, no maybe...if or could/should.

    And so it shall be done, Thank You Jorge.
     
  4. djklmnop

    djklmnop Member

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    Why would you choose Tmax 400 over PanF+ ????

    Just kidding. I've never tested Tmax 400 in Rodinal before, although for tonal scale of 1.05, that would be a little short. Should be around 1.25 range.

    Sorry I couldnt offer any real answers.

    Andy
     
  5. bmac

    bmac Member

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    I'm guessing film speed :wink:
     
  6. djklmnop

    djklmnop Member

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    Film speed determines where you'll make the mark for Zone I, but that doesn't really play a role in density range. .10 is what you would get for Zone I, and 1.25 to 1.35 is what you would get for Zone VIII. So your range would be 1.15 - 1.25. At 1.05, you've fell short somewhere along the line.

    Andy
     
  7. Jorge

    Jorge Inactive

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    Exactly thè problem with zone system testing, you aim for a target range of densities and you end up with numbers that when you are trying to print them they require magic in the darkroom.

    Most enlarging papers can accomodate a negative with a DR of .8, add to that .1 for flare and .1 for printing with a diffusion source and you get a negative that will print properly in a grade #2 paper when it has a DR of 1.00

    At 1.15 to 1.25 I would say you have overshot the mark.