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Thread: Bromide drag?

  1. #1

    Join Date
    Feb 2002
    Location
    Westcliff-on-Sea, United Kingdom
    Posts
    36

    Bromide drag?

    Thanks to those of you that suggested I used constant agitation when using the S toekler formula to develop my B&W sheet and rollfilm - this certainly got rid of the "streamers" nr the edges of the film.

    However, one thing remains as a constant - banding in large areas of even densit y like skies. Not every sheet is affected, not even every frame in a strip of r oll film is affected, but I cant stop this phenomenon from happening.

    When it occurs (and it occurs with annoying regularity) it looks like banding af fecting skies BUT it seems to stop a little way into the "busier" areas of the f ilm. Most of the negs that are affected also show some tonal bleed into the fil m rebate adjacent to the banded areas. In fact, on roll film the sky part of th e neg looks like it has an echo/outline, as if there has been a double exposure (but I know that there hasn't).

    I've tried different film/dev combos (eg Agfapan 100, Delta 100, ID11 at 1+1 and 1+3) but still the banding appears. I've tried agitating drums by hand: 10secs at the head of each minute, 5 secs every 30 secs, and also a unicolor drum on a reversing base, to no avail.

    Any ideas?

  2. #2

    Join Date
    Dec 1998
    Posts
    405

    Bromide drag?

    Are you sure it's not a fixing problem?

  3. #3

    Join Date
    Feb 2002
    Location
    Westcliff-on-Sea, United Kingdom
    Posts
    36

    Bromide drag?

    Hi Chad - I'm pretty sure it isn't a fixer problem. After dumping the dev I use a weak acid stop bath followed by fresh fix (Ilford Hypam) for at least the time stated on the packaging. I then fill the drum/tank with water, dump it, fill it and follow Kodaks archival sequence for washing.

    As variations to the above I have used plain water stop and have also used a running water wash. I never had this problem where I used to live, its only appeared during the past year!

    Neil.

  4. #4

    Join Date
    Nov 1998
    Posts
    339

    Bromide drag?

    One way to find out; after the stop bath remove the film from the drum, fix and HCA it in a tray.

  5. #5

    Bromide drag?

    If it has only appeared during the last year - and not the place you used to live...???

    Maybe the water is different...use destilled water for developer, stop and and fix...

    Maybe???

  6. #6
    Clay
    Join Date
    Feb 2002
    Location
    Asheville, NC
    Posts
    360

    Bromide drag?

    I've had problems with this in the jobo print drums I use to process 7x17 negatives with Pyrocat HD. Try tilting the drum back and forth about every 2 minutes in a direction perpendicular to the drum rotation direction for about 10-15 seconds during development. This solved the problem for me. Check out www.unblinkingeye.com on the Pyrocat-HD page. I wrote a little addition to the article about this specific problem, which may help.

    Clay

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