4 by 5 Glass Carrier for 35mm Neg Newton Rings

Discussion in 'Darkroom Developing and Printing' started by Alan Smithee, Aug 30, 2006.

  1. Alan Smithee

    Alan Smithee Guest

    I wanted to printed a 35mm to included the sprocket holes and film
    information. I thought I'd us a surplus 4x5 glass Beseler carrier. It
    appears now that I'm getting Newton's rings on the prints. My question is:
    why did they bother making a glass carrier with non AN glass if it pretty
    much always leaves rings on the neg. Am I doing something wrong? Could I use
    Kami fluid to stick the neg down? Thx.
     
    Alan Smithee, Aug 30, 2006
    #1
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  2. Alan Smithee

    hoarcroft Guest

    Beseler supply [or did] a glass replacement kit for the 4 x 5 carrier of
    which one side had anti-Newton ring treatment.

    -
     
    hoarcroft, Aug 30, 2006
    #2
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  3. Alan Smithee

    darkroommike Guest

    Most of the traditional usage of a glass carrier was to print smaller
    negatives but using a paper negative between the film and the top glass
     
    darkroommike, Aug 31, 2006
    #3
  4. Alan Smithee

    j Guest

    Huh? I use the glass negative holder provided on the Focomat IIa. No paper
    negative. Ever. It's straightforward "holding the negative flat" technology.
     
    j, Aug 31, 2006
    #4
  5. Alan Smithee

    darkroommike Guest

    Sorry, not enough coffee, most of the time, when using 4x5 glass
    carriers, the practice was to use a paper mask between the negative and
    the upper glass to cut off the non-image light and eliminate fog. The
    mask also added just enough space between negative and glass to
    eliminate Newton Rings.
     
    darkroommike, Sep 1, 2006
    #5
  6. Alan Smithee

    Alan Smithee Guest

    Paper mask? What's that? Wouldn't that cause other problems?
     
    Alan Smithee, Sep 2, 2006
    #6
  7. Traditionally a sheet of opaque paper, black on
    one side, red on the other with a 1/8" grid markings.
    You cut a hole of appropriate size with a razor blade and
    ruler.

    They were used in contact printing to give prints a
    border - back when drugstore 'prints' meant contact
    prints and not enlargements. Back then film for
    the P&S's of the day was large, 120 and up, and
    enlargements weren't really needed. Some of the old
    Kodak folders make negatives 3.75 x 5.5" (or something
    close) on 112 (?) film.

    You need to use a mask when using a larger format
    negative carrier - the light spill around the negative
    will fog/lower the contrast of any prints.
    I don't know of any.

    The black paper from packets of paper or sheet film
    or a few strips of 120 backing paper taped together
    will make a workable mask. You don't have to worry
    much when cutting the hole, in the old days it was
    a pain getting the hole perfect so the print borders
    would straight and fuzz-free.

    If you are using a top-glass only carrier or a
    glasseless carrier 35mm is going to bow in
    a 6x6 or 4x5 carrier. Stop down.

    Two sheets of window glass hinged with duct
    tape make a very workable emergency glass
    carrier for enlargers that take a simple
    carrier such as Beseler and Omega. Sand
    the edges of the glass or have the glass
    shop smooth them or negatives can get
    scratched.

    To preserve sanity tape the mask to the inside of
    the top half of the carrier.
     
    Nicholas O. Lindan, Sep 2, 2006
    #7
  8. Alan Smithee

    Alan Smithee Guest

    Ah I get it now. I was thinking "paper" in front of the negative...duh. So
    basically you can cut a custom mask to print to the edge of the sprockets
    this way. I think I give it a try.
     
    Alan Smithee, Sep 4, 2006
    #8
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