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  1. #11

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    fB+F? I can get blacks, just noticed the time required for diffrerent films since I was doing about 20 contact sheets. The film base response makes sense-should have thought of that. Each film base has its own density. I would like know what that equations is though.... fB+F

    Thank you for all the replies!
    Matt

  2. #12
    jstraw's Avatar
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    fB+F is just a shorthand way to express "film base plus fog," which is the density of the unexposed film edge. Propper proofing time is unigue for each film/developer/light-source/paper/developer combination and even then, unique for each person. Propper proofing time is the minimum exposure required to produce maximum print density through film base plus fog.

    If your film edge is not black, there can't be any black anywhere in the frame.

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