Quite Frankly I am Stumped/ RA-4 Printing.

Discussion in 'Darkroom Developing and Printing' started by Gregory Blank, Sep 3, 2004.

  1. This usually doesn't happen but I am scratching my
    noggin. I am seeing a very slight visible density difference
    at the edges of a 16x20 I am printing. Its a snow image,
    I ruled out fogged paper as I processed a full sheet from the
    box where every print before and after has produced the problem.

    It seems odd that if the easel is a fault that would have not
    run into this before. I routinely make 16x20 prints using the very easel.
    The thing that is most annoying is that its a yellow fog
    that shows more prominently at the corners and the edges. I had been
    doing 16x20's prior to this box when I started seeing the issue in
    another scene. So I Thought maybe an old box of paper.

    The yellow cast, is mainly as overall yellowing of the highlights. The
    thing is I don't see this on smaller images of the same shots, just
    16x20's and just recently. Looked up into the lamphouse diffuser all
    looks OK. Have Tried preweting the RA paper prior to developer no change
    still there.

    I have a timer located next to the easel and I am wondering if its
    causing this, I am off to check it by blacking out the buttons as a last
    resort along with using a black vacuum easel instead of the yellow based
    easel. Has anyone ever run into a yellow easel tainting the color
    of RA?
     
    Gregory Blank, Sep 3, 2004
    #1
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  2. Gregory Blank

    PGG Guest

    My edges get messed up because of a cheap, no-name 11x14 color processing
    drum I use. Just something to consider.
     
    PGG, Sep 3, 2004
    #2
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  3. Thanks for your reply, I had the thought maybe it was
    happening in the drum,...but there was an area of clean
    color adjacent to the white border.

    So I knew the fog was happening at the easel or from the
    lamp house or from my timer. I blacked out the timer, removed the easel
    and viola I looked up and saw a great deal of light spilling from the
    back of the enlarger unto the ceiling, I don't know when I removed the
    black cloth I had over the fan vent but apparently since the last two
    times I made color 16x20's any way problem apparently solved.
     
    Gregory Blank, Sep 3, 2004
    #3
  4. Gregory Blank

    Jim Phelps Guest

    Greg,

    If the yellow easel were causing the fogging, wouldn't the fog be blue?
    Don't think that's the problem (light reflecting back from the easel). You
    say other print sizes from the same box don't have the problem, so it's not
    the paper. You're not specific enough in the description of the timer
    lights. Is the density change just on that one edge or uniform around the
    print? You may be correct with your thought that the timer is fogging if
    it's in that one edge. It would also be supported by the smaller prints as
    they don't get as close to the timer as the 16X20's. However, again, back
    to the color, the illumination of the timer would need to be blue, not
    yellow.

    Are you sure you're not getting a light leak from the head? Try placing
    a clean, white 16X20 in the easel and turn the lights out (all light,
    safelight, timer and the enlarger's too). Sit back an relax for 5 minutes
    and then turn the enlarger on with a lens cap over the lens. See if you
    detect a light leak.

    Can't think of any problems in processing that would yellow the
    highlights. What are you using to process? A Jobo or something else?

    Good luck and let us know what (if anything) you find.

    Jim
     
    Jim Phelps, Sep 3, 2004
    #4
  5. Yep thats what I discovered it to be late last evening....I had removed
    the black out material I had over the fan apparently several printing
    sessions ago.
     
    Gregory Blank, Sep 3, 2004
    #5
  6. Gregory Blank

    Jim Phelps Guest


    Thanks for the update. Nothing else made sense...

    Jim
     
    Jim Phelps, Sep 3, 2004
    #6
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