Glass negative carrier

Discussion in 'Darkroom Equipment' started by Jas, Feb 19, 2009.

  1. Jas

    Jas Member

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    Hello everyone,
    I am having problems with my negatives popping under the enlarger, and I am wondering if I should spring for a glass neg carrier, or would that just drive me even more crazy. Thoughts?
     
  2. Colin Corneau

    Colin Corneau Subscriber

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    If you get one make sure it's anti-Newton glass - otherwise you'll spend a bunch of money and only have little marks and circles on your prints to show for it.

    Not that I did that, or anything, to find out the hard way....
     
  3. Richard Wasserman

    Richard Wasserman Member

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    I use a full glass carrier for 4x5 negatives and am happy to spend the short time it takes to make sure it is clean. On smaller formats such as 6x7 and 135, I use a 1/2 glass carrier where there is glass on top of the negative, but the bottom of the carrier is open. Having 2 glass surfaces to keep dust free instead of 4 does make life a bit easier. I use a Durst 1200 enlarger and it is easy to pop glass and negative holders in and out to configure the carrier any way I need. If this is not an option for you I would suggest using whatever glass carrier you can, as I have found the benefits to greatly outweigh any inconvenience.

    Richard Wasserman
     
  4. John Bragg

    John Bragg Member

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    I would say yes, get one. Use anti newton glass on the top and clear glass underneath. Just needs more care with dusting as there are 4 more surfaces brought into play. The reward is perfectly flat negatives during printing and no more popping negatives. I have used one for years and wouldn't go back to glassless.
     
  5. Anscojohn

    Anscojohn Subscriber

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    You do not say what is making the negs pop. If it is too much heat from the light source, a heat absorbing glass might be an option.
     
  6. BetterSense

    BetterSense Member

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    What do yall mean by popping?
     
  7. PVia

    PVia Member

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    Would I be able to use a piece of etched or sandblasted glass on top?
     
  8. L Gebhardt

    L Gebhardt Subscriber

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    I don't know about sand blasted or etched glass, but I suspect you would see the pattern. You could try Prazio Anti-Newton spray. It's a fine powder that sticks to film or glass. I would try it on the glass. I have some that came in a Prazio Trial kit for drum scanning. It works fine on film mounted on the scanner so I suspect it will work fine on the glass. Still I would, and did, get anti-newton class for the negative carrier.
     
  9. OP
    OP
    Jas

    Jas Member

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    Thanks for the replies folks,
    I recently changed film developers and as a result my negatives take a longer exposure under the enlarger. As a result, the heat from the bulb is causing the negs to pop, in spite of all my precautions. I have a Beseler enlarger and I believe they only sell one anti-newton type carrier. I like the idea of only one piece of glass to deal with. I wonder if I could remove the bottom glass from the carrier.
     
  10. Konical

    Konical Subscriber

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    Good Morning, Jas,

    Since you have a Beseler enlarger, consider getting a Negaflat carrier (Negatrans for 35mm) instead of a glass carrier. It is difficult to imagine that anything could hold a negative much flatter than a Negaflat. Negaflat usage requires only the dusting of the negative, not the four additional surfaces a glass carrier has.

    Konical
     
  11. David Brown

    David Brown Member

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    The negative will buckle, or "pop" due to too much heat from the enlarger head. Much as slides do in a projector. (You may or may not know about that circumstance either.) This, off course, makes the image go out of focus. Whether or not the neg is damaged depends on the amount of heat and the length of time.
     
  12. Jon Shiu

    Jon Shiu Subscriber

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    Hi, I've used the beseler 6x9 glass carrier on the 23C enlarger and didn't have much problem with dust. It is really not a big problem as people fear. I highly recommend it to keep your negs flat and in focus. You can take out the glass, but then film will not be supported, so it wouldn't work.

    You can use a regular (glassless) carrier with a piece of AN glass from a gepe slide mount taped to inside of the upper frame. Make sure to sand the edges of the glass so it won't scratch the film

    Jon
     
  13. John W

    John W Member

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    I've used the LPL 4x5 glass carriers before, and they're a joy. No undue dust problems. but then again that darkroom has compressed air plumbed everywhere which makes life easier in that regard.
     
  14. Anscojohn

    Anscojohn Subscriber

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    You don't say what enlarger and what size negs. I can make up to one minute exposures with a Beseler 67S dichro head with no problems. And as I mentioned, you might just need a heat-absorbing glass under your light source if it is a tungsten bulb. You don't really say.
     
  15. Konical

    Konical Subscriber

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    Good Evening Jas,

    What John says also goes for me with the condenser-head Beseler 45 enlarger. Never a problem, even with standard negative carriers which I used for decades before acquiring both a Negatrans and a Negaflat. I've always used the heat absorbing glass which came with the enlarger.

    Konical
     
  16. OP
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    Jas

    Jas Member

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    Ok, I want that enlarger (the Beseler 45). Mine is the 23c model, not nearly as fancy. I print mostly 35mm with an occasional 2 1/4. Heat absorbing glass, I like that idea.
     
  17. Anscojohn

    Anscojohn Subscriber

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    That's why the heat aborbing glass comes with some enlargers. The condensors sometimes act as a heat absorbing glass, but some enlargers need the real thing. I do not know enough about physics to know what makes for a heat-absorbing glass, but it is special, I guess.