Tri-X coating blotch

Discussion in 'B&W: Film, Paper, Chemistry' started by Uhner, Jan 29, 2008.

  1. Uhner

    Uhner Member

    Messages:
    1,101
    Joined:
    Feb 28, 2006
    Location:
    Oslo, Norway
    Shooter:
    Multi Format
    I developed a roll of Tri-X (135) yesterday, containing a few images where I try out an idea for an avatar to use here at APUG (hence the depressing man drinking milk). Anyway, the film has some strange, what I believe to be, coating imperfections that can be seen in the attached straight scan. The larger “blob” and the smaller specks have a pale yellow colour and are clearly on the emulsion side.

    Does anyone know what this is? I’m interested because I have never encountered anything like this before.
     

    Attached Files:

    • TX.jpg
      TX.jpg
      File size:
      28.3 KB
      Views:
      112
  2. Akki14

    Akki14 Member

    Messages:
    1,873
    Joined:
    Feb 2, 2007
    Location:
    London, UK
    Shooter:
    4x5 Format
    Try refixing it? Just sounds like the film didn't fix (but there's no picture of the film itself so that white blob could be anything).
     
  3. BobNewYork

    BobNewYork Member

    Messages:
    1,067
    Joined:
    Jan 1, 2008
    Location:
    Long Island,
    Shooter:
    Medium Format
    That looks to me like the emulsion touched the next layer on the reel. Looks like no chemical activity at that point. Could the film have buckled at this point.

    Only reason I say this is "been there, done that!"
     
  4. Uhner

    Uhner Member

    Messages:
    1,101
    Joined:
    Feb 28, 2006
    Location:
    Oslo, Norway
    Shooter:
    Multi Format
    Always a possibility...

    Here are two more scans of the problem:
     

    Attached Files:

  5. canuhead

    canuhead Member

    Messages:
    616
    Joined:
    Mar 12, 2006
    Location:
    Southern Ont
    Shooter:
    Multi Format
    Agree with BobNewYork, film on film contact. Refixing will simply leave clear film at that spot.
     
  6. BobNewYork

    BobNewYork Member

    Messages:
    1,067
    Joined:
    Jan 1, 2008
    Location:
    Long Island,
    Shooter:
    Medium Format
    Uhner:

    Definitely looks like a problem loading the film on the developing reel. Do you recall if the film went on the reel easily or did you have a problem? I really think that's your answer.:sad:

    Bob
     
  7. Uhner

    Uhner Member

    Messages:
    1,101
    Joined:
    Feb 28, 2006
    Location:
    Oslo, Norway
    Shooter:
    Multi Format
    It went on quite smooth and uneventful as usual. There are no pinch marks on the film and I did not notice anything out of the ordinary when I took the reel from the tank or opened the reel.

    Anyway – I believe that you are right. Shame on me for calling this a coating imperfection.
     
  8. BobNewYork

    BobNewYork Member

    Messages:
    1,067
    Joined:
    Jan 1, 2008
    Location:
    Long Island,
    Shooter:
    Medium Format
    No shame! When it happened to me I saw the first blotch as the film came off the reel and cursed the manufacturer......until I saw the other blotches!!! It happens - just so long as it wasn't someone's wedding!!!:D:D
     
  9. jim appleyard

    jim appleyard Member

    Messages:
    2,121
    Joined:
    Nov 21, 2004
    Shooter:
    Multi Format
    This is one layer of film touching another on your reel during devving. Photo students (and those that go on to become professionals) call it leprosy. It happens to all of us at one point or another. The first two roll of film I ever did were covered with it.
     
  10. BobNewYork

    BobNewYork Member

    Messages:
    1,067
    Joined:
    Jan 1, 2008
    Location:
    Long Island,
    Shooter:
    Medium Format
    Uhner:

    I meant to say earlier that that glass looks like it was made for beer. You should be aware that bad things happen to people who drink milk out of a pint glass!!:D:D:D:D
     
  11. Uhner

    Uhner Member

    Messages:
    1,101
    Joined:
    Feb 28, 2006
    Location:
    Oslo, Norway
    Shooter:
    Multi Format
    Ah, given that that was my first glass of milk in years it might explain why I haven’t had any film leprosy problems before.

    Naturally, in the interest of science, I have to test if a shot of me drinking beer will produce the same problem or not.
     
  12. BobNewYork

    BobNewYork Member

    Messages:
    1,067
    Joined:
    Jan 1, 2008
    Location:
    Long Island,
    Shooter:
    Medium Format
    :D:D:D:D:D