Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 69,954   Posts: 1,522,797   Online: 1001
      
Page 3 of 8 FirstFirst 12345678 LastLast
Results 21 to 30 of 76
  1. #21
    winger's Avatar
    Join Date
    Jan 2005
    Location
    Page County, IA
    Shooter
    Multi Format
    Posts
    2,387
    Images
    47
    Quote Originally Posted by papagene View Post
    Bethe - I had a similar problem a while back with 120 film in stainless reels. The problem was that I was not cleaning my reels after the foto-flo bath, just rinsing them. I got high density areas on the sides of the next set of negs developed.
    The solution was to use an old toothbrush and some Ivory (bar) soap and give the reels a quick cleaning. Never had the problem again.
    YMMV

    Good luck.

    gene
    Sorry - mine get scrubbed pretty well after each use (it's the labrat in me).

    Thanks for all the help, gang!

  2. #22

    Join Date
    Jul 2009
    Location
    South Texas, USA
    Shooter
    4x5 Format
    Posts
    1,885
    Is that darker area continuous down the entire roll of film? Your development procedure doesn't seem out of whack although a lengthier time is desirable, IMO. Besides, over-agitation will have the opposite effect on film density... more density in the center.

    *** I'll bet you're not fixing the film completely.

  3. #23
    Nicholas Lindan's Avatar
    Join Date
    Sep 2006
    Location
    Cleveland, Ohio USA
    Shooter
    Multi Format
    Posts
    2,372
    Images
    4
    You mention "tipping 90 degrees", this sounds rather gentle. The usual manufacture (er, Kodak) specified agitation for SS is to invert the tank 180 degrees, 1-2 inversions/second, for 5 seconds every thirty seconds, rotating the tank slightly so it is not always inverted in the same direction. I notice Ilford specifies 4 inversions/for 10seconds/every minute.

    The 5 minute developing time is rather short and may be contributing to the unevenness.

    Some developer/film combinations seem to be more agitation sensitive than others.

    I would give a try with D-76 1:1 and a Kodak agitation scheme and see if this gives even negatives. Alternatively, try the Ilfosol at 1:14 with a more vigorous agitation and see if it improves things. Probably a good idea to use test rolls for the experiments - pictures of an evenly lit surface, like a wall in the shade placed on ZVII.

    To verify liquid quantity just put an empty reel in an open tank and measure how much liquid is needed to cover the reel(s).
    DARKROOM AUTOMATION
    f-Stop Timers - Enlarging Meters
    http://www.darkroomautomation.com/da-main.htm

  4. #24
    JBrunner's Avatar
    Join Date
    Dec 2005
    Shooter
    35mm
    Posts
    6,780
    I believe it is an agitation issue. Your agitation needs to be more vigorous, more random, and use full inversions. You don't have enough, and random enough agitation, the person who said you had too much is wrong. Over agitating will result in increased contrast and density, not what you have.

  5. #25
    DWThomas's Avatar
    Join Date
    Jun 2006
    Location
    SE Pennsylvania
    Shooter
    Multi Format
    Posts
    2,203
    Images
    63
    I would think it's agitation. I normally do four complete inversions in about 5 seconds each minute (this is with HC-110 1+63 on Acros and others.) And I do 30 seconds worth of inversions with an occasional thunk of the stainless tank on a wood tabletop at the beginning. I also believe I've had more even development since I worked out a developer volume (425 mL here for one 120) to leave about 1/4 inch empty space at the top of the tank. I also rotate the tank a bit in the inverting hand between each inversion to move the rotational axis of the inversion around.

    (Gad -- makes it all sound more complicated than it seems when doing it!)

    DaveT

  6. #26

    Join Date
    Jul 2009
    Location
    South Texas, USA
    Shooter
    4x5 Format
    Posts
    1,885
    Just try re-fixing the film. At least you can rule that out with an existing roll of film... no harm done to new pics.

  7. #27
    winger's Avatar
    Join Date
    Jan 2005
    Location
    Page County, IA
    Shooter
    Multi Format
    Posts
    2,387
    Images
    47
    You mention "tipping 90 degrees", this sounds rather gentle. The usual manufacture (er, Kodak) specified agitation for SS is to invert the tank 180 degrees, 1-2 inversions/second, for 5 seconds every thirty seconds, rotating the tank slightly so it is not always inverted in the same direction. I notice Ilford specifies 4 inversions/for 10seconds/every minute.

    The 5 minute developing time is rather short and may be contributing to the unevenness.
    I do the agitations similar to Jason's video, but definitely not as vigorously as he in the first 30 sec (just watched the video again - thanks Jason). So this is what I'll change first (the chemist in me says to change just one variable at a time).
    The scheme above is what I do, just maybe not rough enough.
    Yes, the 5 minutes seems short, but I've had other good negs from it. It is shorter than the Ilfosol S time. I limit myself to liquid developers as I hate mixing from powders (and have asthma).

    Once I get myself off the couch and away from the computer, I'm going to go shoot some gourds with a white background outside (it's a sunny day here). If it works, I'll at least have some shots I can use for handcoloring.

  8. #28
    Leighgion's Avatar
    Join Date
    Jun 2009
    Location
    Orcas Island, WA
    Shooter
    Medium Format
    Posts
    357
    Images
    16
    I'm inclined to agree the problem is that the agitation routine is too gentle.

    Only shot two rolls of Acros myself, but using 30 second initial agitation and ~10 seconds every minute thereafter in D76 with full, sometimes pretty rough, inversions and taps yielded me negatives as perfect as I could ask for.

  9. #29

    Join Date
    Jul 2009
    Location
    South Texas, USA
    Shooter
    4x5 Format
    Posts
    1,885
    I still suggest you try re-fixing first. It can't hurt.

  10. #30

    Join Date
    Jun 2004
    Location
    Portland, OR
    Shooter
    4x5 Format
    Posts
    3,268
    Remember that rotory processors like a Jobo have very vigourous agitation and they are known for even processing.
    Kirk

    For up from the ashes, up from the ashes, grow the roses of success!

Page 3 of 8 FirstFirst 12345678 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin