EFKE 25 Problem

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

  1. Jimbob

    Jimbob Subscriber

    Messages:
    57
    Joined:
    Jan 16, 2004
    Location:
    Flower Mound
    Shooter:
    Medium Format
    I shot and processed a roll of EFKE 25 in 120 format and used Pyrocat HD as my developer. Interesting results to say the least. The film looks like I would expect an ISO 25 film to look -- contrasty, sharp etc. However, before I was done I could see that the emulsion (gel) was beginning to separate from the film base. I used Formulary TF-4 fixer for 4-minutes. Water for stop bath. Distilled water throughout the process. I also noticed that there were several specks of emulsion floating around in the final water rinse. The emulsion appeared to have a very heavy magenta stain that would not fix or wash out. This is now my second roll of this film that has ended up this way. My question is what could I be doing wrong? Thanks for any help.
     
  2. Silverpixels5

    Silverpixels5 Member

    Messages:
    594
    Joined:
    Mar 19, 2003
    Location:
    Houston, TX
    Shooter:
    Multi Format
    Not sure why the emulsion is seperating. I use this combination often and have never had this problem. I aslo use TF-4 for the same amount of time. The magenta stain seems to be normal, as I have got it every time. Not to mention the film curls like a mad dog. Perhaps you just got a bad batch of film. Try another developer and see if you get the same results to be sure.
     
  3. noseoil

    noseoil Member

    Messages:
    2,898
    Joined:
    Oct 6, 2003
    Location:
    Tucson
    Shooter:
    Multi Format
    One suggestion I have for Efke 25 is to presoak for a few minutes before developing. This will rid the film of the anti-halation backing layer and allow a good displacement of water for developer and even development.

    If you are having some separation of emulsion from the backing, I would first suspect water temperature. Was one step in your process too hot? Try everything at 70f and make sure it stays about there.

    The film normally has a pinkish tint to the clear (unexposed) base in what I've seen. Is your TF-4 fresh and uncontaminated?
     
  4. fingel

    fingel Member

    Messages:
    298
    Joined:
    Feb 12, 2003
    Location:
    San Francisc
    Shooter:
    Multi Format
    I have developed this in Rodinal, D76, and more receintly PMK without trouble. Maybe try a fixer with hardener as the emulsion is supposed to be very soft. I use Kodak fixer with hardener and have never had a problem with the emultion scratching or flaking off. It still stains fine with PMK even without the post soak, infact I think my Efke 25 negitives look and print better after I stopped using TF-4 and post soaking in spent developer, but that is just my subjective opinion, your results may differ.
    Hope that helps.
     
  5. roy

    roy Member

    Messages:
    1,308
    Joined:
    Sep 7, 2002
    Location:
    West Sussex
    Shooter:
    Medium Format