Red filter included with contrast filters...

Discussion in 'Darkroom Developing and Printing' started by Jed Savage, Nov 21, 2004.

  1. Jed Savage

    Jed Savage Guest

    I bought a used darkroom from a friend and it came with VC filters...
    along with the filters (in the same box but not cased with the other
    filters) there is also a red filter (very RED red) same construction
    but has it's own case - what's this for?
     
    Jed Savage, Nov 21, 2004
    #1
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  2. Jed Savage

    Joe Makowiec Guest

    Focusing on the paper.
     
    Joe Makowiec, Nov 22, 2004
    #2
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  3. and positioning the paper when not using an easel.
     
    Claudio Bonavolta, Nov 22, 2004
    #3
  4. Jed Savage

    Jim Phelps Guest

    Both the other answers are correct, - sort of. Don't try to focus with the
    filter in place as the image will be to dark and your eyes are not suited to
    focusing with a red image. The purpose was to allow you to project the
    image on the easel with your B&W paper in place and finalize the composition
    on the paper and then flip it out to begin your exposure, and then back in
    (or turn the lamp off) to end the exposure. In over 27 years of darkroom
    experience, I think I've used it twice, and that was when I was working
    difficult negatives and I flipped it in and out to make sure I was
    positioning my mask properly. However, just like a safelight, you should
    test it (if you're going to use it) with the paper of your choice to assure
    it won't cause fogging.

    Jim
     
    Jim Phelps, Nov 22, 2004
    #4
  5. Jed Savage

    Jed Savage Guest

    I thought B&W VC paper was sensitive to red light - and that's why
    there are the amber filters for safe lights. Must be just a certain
    spectrum of red?
     
    Jed Savage, Nov 22, 2004
    #5
  6. It can look red but still emit in the sensitive part of the spectrum for your paper.
    Like presumed inactinic lights, it's a good habit to check it from time to time.
     
    Claudio Bonavolta, Nov 22, 2004
    #6
  7. Jed Savage

    John McGraw Guest

    and positioning a vignette or burning card, or dodging tool.
     
    John McGraw, Nov 22, 2004
    #7
  8. Jed Savage

    Mike King Guest

    VC paper is sensitive to blue and green light, insensitive to red.
    Panchromatic papers like Panalure and all color paper are sensitive to red
    green and blue light but there is a gap in sensitivity where the dark amber
    "safelight" resides. Probably more correct to say less "un"-safe rather
    than truly safe.
     
    Mike King, Nov 22, 2004
    #8
  9. Jed Savage

    Jim Phelps Guest

    Mike (Darkroom Mike) already explained the sensitivity issue. However, like
    I said my the last sentence in the above post, you should always test, just
    like a safelight...
     
    Jim Phelps, Nov 23, 2004
    #9
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