darkroom meter calibration

Discussion in 'B&W: Film, Paper, Chemistry' started by danzyc, Apr 4, 2009.

  1. danzyc

    danzyc Member

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    hello friends! how many people have calibrated the meter with the skin tone???

    my jobo comparator 2 due seems to be not reliable if i should calibrate it with the skin tone...


    thanks
     
  2. BobNewYork

    BobNewYork Member

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    The meter should just provide a print exposure that replicates the density of the tone you calibrated it to. Be aware that any image has a range of skin tones - the shadowed side, the highlight side, the near-specular reflection from the forehead. Nonetheless the meter should replicate the exact tone that you calibrated - to the same paper and batch that you used for calibration of course.

    Bob H
     
  3. Nicholas Lindan

    Nicholas Lindan Advertiser Advertiser

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    A 'Skin Tone' is the hardest tone to pick for calibration: As Bob has pointed out, there are many, many 'skin tones'; as many tones as there are ways to light skin. You may as well calibrate to a 'rock tone'.

    The proverbial 'skin tone' - 40% reflectance or so - applies to a Caucasian palm in diffuse illumination. Hardly a common, or interesting, subject.

    You need to calibrate your meter to a range of tones and then pick the appropriate tone for the image you are printing.
     
  4. Nicholas Lindan

    Nicholas Lindan Advertiser Advertiser

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    There are an infinite number of wrong ways and only one true way; the chances that you are on the one true way are infinitesimally small.
     
  5. danzyc

    danzyc Member

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    the thinnest negative part(black) for example seem to be the most reliable value...i think...

    the skin tone is much more difficult...