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  1. #1

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    Pyrocat HD processing times for Efke PL100 in a jobo processor

    Does someone have dev times for 4x5 rated at 100 using Pyrocat HD mixed at 3:2 at 70, 75 and 80 degrees (lets see thats 20C, 25C and 30C I think).

    Maybe even the additional process times for presoak, post-dev rinse, fix and final rinse?

    And maybe even dev times for Pyrocat HD mixed at 1:1, 2:2, other combinations:

    And how about comparison of results of FP4 and Efke films used in Pyrocat HD. Whew-thanks!

  2. #2

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    Welcome to Apug.

    I believe that several of your questions are answered in this article by Sandy King: http://unblinkingeye.com/Articles/PCat/pcat.html

  3. #3
    Jim Noel's Avatar
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    Read Sandy's article.
    Development depends on how you are going to print the negative - less contrast for silver gelatin, maximum for salt. All the other processes fall ln between.
    [FONT=Comic Sans MS]Films NOT Dead - Just getting fixed![/FONT]

  4. #4

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    Quote Originally Posted by Jim Noel View Post
    Read Sandy's article.
    Development depends on how you are going to print the negative - less contrast for silver gelatin, maximum for salt. All the other processes fall ln between.
    I've read it and understand that the time used is dependent on the desired ci. The question was for the particular film, Efke 100, which is not listed in the article, and now that I've read the article for a paladium neg.

  5. #5

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    Thanks

    for the responses and pointer to Sandy's article

  6. #6
    Jim Noel's Avatar
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    For Palladium:
    Efke 100, PCat 2:2:100, 24 minutes @70 deg F.
    This is the time I used in an Expert drum at the lowest possible speed.

    I now add ascorbic acid which gives me better contrast in less time.

    Efke 100; ei 100;
    Developer: Pyrocat+ 4(A)+3(B)+1(0.1 Ascorbic acid)+100; 75 deg, 14 minutes

    Note that ascorbic acid breaks down in solution with moderat storage times.

    These may or may not work for you. Individual testing is the only final answer.
    [FONT=Comic Sans MS]Films NOT Dead - Just getting fixed![/FONT]

  7. #7

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    Quote Originally Posted by Jim Noel View Post
    For Palladium:
    Efke 100, PCat 2:2:100, 24 minutes @70 deg F.
    This is the time I used in an Expert drum at the lowest possible speed.

    I now add ascorbic acid which gives me better contrast in less time.

    Efke 100; ei 100;
    Developer: Pyrocat+ 4(A)+3(B)+1(0.1 Ascorbic acid)+100; 75 deg, 14 minutes

    Note that ascorbic acid breaks down in solution with moderat storage times.

    These may or may not work for you. Individual testing is the only final answer.

    Thanks Jim for the starter!

  8. #8

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    FWIW Sandy and Pat Gainer recommend using pyrocat-mc (http://www.photosensitive.ca/wp/pyrocat-mc or http://www.apug.org/forums/forum37/2...riences-2.html) for drum developing as there is less aerial oxidation. Is a bit more fiddly to make and im using up my HD stock so cant comment as yet from personal experience.

    You have some starting times and as stated will need to experiment. Also worth a look is the massive dev chart at http://www.digitaltruth.com/devchart.html. This gives 8' for 2:2:100 at 20C for silver printing.

    ps All of the stuff Ive seen uses 1:1:100 for standard or 2:2:100 for drum work--what's with the 3:2?



 

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