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  1. #1
    Mustafa Umut Sarac's Avatar
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    BW Paper, BW Print optimized Color Negatives either Analog or Digital

    AFAIK only colored bw film negatives are stained Pyro ones. And only BW paper optimized print systems are Zone System and Beyond the Zone System. But there is no trace of paper optimized color digital or analog negative for BW prints.

    And I dont know if there is a panchromatic paper available. May be all papers are orthochromatic and they act to shades of blue and green printed digital,analog negatives more effectively. I am starting to research of color shades of Pyro Negatives and effective use of these shades in color printed digital or analog negatives.

    I am defending to mask various parts of the image and shade with different colors and print color digital or analog negatives for contact print.

    I will try to feed that article referencing collected new posts at APUG forums. Its seems to me that is a new idea and I found myself forced to post that article asap.

    I will try to find color sensivity curve of an BW photographic paper and engineer an color negative here with APUG members.

    In few days , there will be more posts here from me and awaiting your ideas.

    Mustafa Umut Sarac
    Istanbul

  2. #11
    Mustafa Umut Sarac's Avatar
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    What is the difference between color file and color negative and how differ to print analog or some lcd screen ? - If digital files printed by lcd optical screen on this paper ? If they printed by laser or rgb light sources , I dont know.

  3. #12
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    I don't know, as I don't do any digital. You should probably ask at DPUG.

  4. #13

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    If you think about why we might use colour contrast filters in B+W photography you will understand why colour negative to B+W may not come out as expected.
    "There are a great many things I am in doubt about at the moment, and I should consider myself favoured if you would kindly enlighten me. Signed, Doubtful, off to Canada." (BJP 1914).

    Regards
    Bill

  5. #14
    Mustafa Umut Sarac's Avatar
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    Bill , Thank you, good point ! I will ask that at forums.

  6. #15

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    The papers mentioned here are designed for tri-color laser system.

  7. #16
    Mustafa Umut Sarac's Avatar
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    Thank you Vpooler. Yes , Prof.Pixel warned as they made to printed under RGB laser systems not white light. Its better to leave these panchro papers at their place and switch to ortho papers.

    Now the question , how we can improve the bw print with colored , stain colored, negative ? Can we paint the negative , I bet silk dyes works or can we digital manipulate the masks and color zones referencing the spectrum.
    I will find a widely available paper and continue.

  8. #17

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    Well, if the negative is stained and affects contrast, you could probably just put a filter with exactly the opposite effect to use. Determine the shift and correct accordingly. And I see why not to do local contrast masks. People do that, I am sure.

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