Page 1 of 2 12 LastLast
Results 1 to 10 of 16

Thread: Marks on my negatives

  1. #1
    Christer
    Join Date
    Nov 2009
    Location
    Stockholm, Sweden
    Posts
    7

    Marks on my negatives

    Hi guys!

    Can anyone give me some help so I will get rid of my developing marks?

    I get the line (to the right on the attached picture) on all my negatives and I can also se some unevenness on even backgrounds.(due to uneven development?)
    It is NOT bad paper back drops.

    I develop my sheet film 8x10 in tanks using film hangers as in this article.
    http://www.tpub.com/content/photogra.../14209_261.htm
    I agitate as in the article (next page) as well.
    I predevelop the films in water for about two minutes, develop in D-76, after that stop bath and then Kodak F-24 and finally a proper rinse.

    I shoot with a sinar p2. Copal shutter. Schneider Symmar-S 300/5.6.
    Its the same marks with different f-stops.

    Why do I get the line to the right (the bottom of the film hanger) and why do I see a unevenness in my negatives.
    Can I do something about it?

    Thanks for your replies!!
    /Christer

  2. #2
    David de Gruyl's Avatar
    Join Date
    Dec 2009
    Location
    Philadelphia
    Posts
    278

    Re: Marks on my negatives

    I may be able to help with unevenness: what is your agitation method? Perhaps increasing the agitation frequency while maintaining the same total agitation (say every 30 sec from 1 minute, halving the amount of time / number of lifts.).

    I do not have any idea what that line is, though. I assume this is with different filmholders and different hangers, not with the same one filmholder, anyway.

    I ask this because it looks like a line from something dragging on the film from either loading or unloading in the filmholder.

    If it were more centered, I would wonder if you packed too many films into a box with a kodak envelop (center seam).

  3. #3

    Join Date
    Jan 2007
    Location
    Minneapolis, MN
    Posts
    1,255

    Re: Marks on my negatives

    Do you presoak your film? Do you fill your tank with developer only 3/4 to the top? I had a batch of 4x5's do this a few years back in a partially filled tank. That may be the waterline for your developer when you insert film into the tank, prior to first agitation? Or that you let the film sit "too long" between agitations? How long would be too long ?

    Or it may be a manufacturing defect in the film.

    Check by tray processing a sheet, and see if the problem remains.

  4. #4
    bob carnie's Avatar
    Join Date
    Jan 2004
    Location
    Toronto, Ontario,
    Posts
    4,591

    Re: Marks on my negatives

    Christer
    IMO
    You are not getting enough agitation within the first 15 seconds of development.
    Very critical with grey nuetral backgrounds.

    Bob

  5. #5
    Resident Heretic Bruce Watson's Avatar
    Join Date
    Sep 2003
    Location
    USA, North Carolina
    Posts
    3,299

    Re: Marks on my negatives

    Quote Originally Posted by bob carnie View Post
    Christer
    IMO
    You are not getting enough agitation within the first 15 seconds of development.
    Very critical with grey nuetral backgrounds.

    Bob
    Yup. Constant agitation from the moment it hits the developer for at least 15 seconds if not 30 is crucial. Film is very sensitive to developer uptake.

    Bruce Watson

  6. #6
    Christer
    Join Date
    Nov 2009
    Location
    Stockholm, Sweden
    Posts
    7

    Re: Marks on my negatives

    David, Robert. Bob and Bruce!

    Thanks for your wise answers.
    The agitation may be the thing! Ill be a bit more intense the first 30 seconds in the developer.
    Maybe that solves the problems with the lines as well. Because they are made during the developing. They are not scratches. And yes, my tanks are full uo to the rim and I do presoak before the developer.
    I really like this forum.
    Cheers!
    /Christer

  7. #7
    ic-racer's Avatar
    Join Date
    Feb 2007
    Posts
    5,816

    Re: Marks on my negatives

    You could load some film in the hangars with the notch toward the developer surface and load some others in the frames with the notch toward the bottom of the tank. Then see where the line shows up.

  8. #8
    Christer
    Join Date
    Nov 2009
    Location
    Stockholm, Sweden
    Posts
    7

    Re: Marks on my negatives

    Good idea!
    Thanks / Christer

  9. #9

    Re: Marks on my negatives

    Christer, have you really high level of developer in the tank? This kind of marks I vave seen when I was developing with less than a half inch of level over the upper part of the hanger.
    Hope this helps
    Claudio Sz

  10. #10

    Join Date
    Dec 2007
    Posts
    350

    Re: Marks on my negatives

    I'm guessing the line is coming from the holder. The "line" I don't believe is a developing error.If you notice, the line is straight not crooked which would lead me to think a loading problem.But if you were scratching the neg during loading it would be a dark line not a white line.Check all of your holders closely and try a different film type.

Similar Threads

  1. Scanning old negatives - obsolete formats
    By Scott Whitford in forum Digital Hardware
    Replies: 7
    Last Post: 27-Jan-2009, 15:12
  2. A cloud-like pattern on my negatives
    By Thomas Greutmann in forum Darkroom: Film, Processing & Printing
    Replies: 8
    Last Post: 18-Oct-2007, 09:43
  3. Marking 4x5 negatives
    By Calamity Jane in forum Darkroom: Film, Processing & Printing
    Replies: 9
    Last Post: 30-Mar-2005, 08:32
  4. Small round marks on my negatives
    By Robert Skeoch in forum Cameras & Camera Accessories
    Replies: 3
    Last Post: 4-Aug-2004, 01:10
  5. 60 Year Old Negatives - Impressive!
    By Michael J. Kravit in forum Darkroom: Film, Processing & Printing
    Replies: 9
    Last Post: 3-Oct-2003, 17:33

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •