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  1. #11
    Curt's Avatar
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    Even though I have a Thomas safelight I just use a single red safelight turned away from my work area.
    Everytime I find a film or paper that I like, they discontinue it. - Paul Strand - Aperture monograph on Strand

  2. #12

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    Quote Originally Posted by mrtoml View Post
    One of them is 'Adox Fine Print Vario Classic'. I realise now that
    this paper requires a 'dark red' safelight as it has a higher than
    average silver content. I have a Paterson red/orange safelight.
    Will this be OK? Any advice appreciated. Cheers.
    Silver content has nothing to do with a paper's spectral
    sensitivity. Your Vario is green and blue sensitive. The
    red/orange may do. Depends on how long the paper
    is exposed to the safelight's level of illuminance.

    Any color, even white, will do so long as the paper's time
    of exposure and/or the level of light are so little as to allow
    working with the paper in a practical manor. I work in a quite
    brightly lit darkroom processing Graded paper. Graded allows
    a high level of darkroom lighting because it is for all intents
    and purposes blue only sensitive. Yellow through orange
    are a good choice for Graded. Dan

  3. #13
    mrtoml's Avatar
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    Quote Originally Posted by dancqu View Post
    Silver content has nothing to do with a paper's spectral
    sensitivity. Your Vario is green and blue sensitive. The
    red/orange may do. Depends on how long the paper
    is exposed to the safelight's level of illuminance.
    Thanks for the reply. So is this information from Retro where I bought the paper wrong?

    "NOTE: Due to the very high silver content only use this paper with a RED safelight which is some distance away, fogging may occur otherwise. For the same reason the paper needs at least 3 minutes in the developer to ensure correct image development." Retrophotographic.com

    The ADOX site also states:

    QUOTE:
    "Safelight: dark red only
    This paper is very sensitive to safelight fogging. Please make a fogging test bevore (sic) use.

    Spektrale (sic) response: 380 - 580 nm with Peak at 540 nm.

    Please use dark red safelights only !"
    Mark Tomlinson
    Currently using Bronica RF645+65mm, Leica M6, Bessa R2a, Nokton LTM 50/1.5, Zeiss Biogon ZM 35/2.8, Nikon 35mm SLRs.
    Join the lith printing forum at http://www.lithprinting.net/

  4. #14
    CBG
    CBG is offline

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    Quote Originally Posted by mrtoml View Post
    Thanks for the reply. So is this information from Retro where I bought the paper wrong?

    "NOTE: Due to the very high silver content only use this paper with a RED safelight which is some distance away, fogging may occur otherwise. For the same reason the paper needs at least 3 minutes in the developer to ensure correct image development." Retrophotographic.com

    The ADOX site also states:

    QUOTE "Safelight: dark red only
    This paper is very sensitive to safelight fogging. Please make a fogging test bevore (sic) use.
    Spektrale (sic) response: 380 - 580 nm with Peak at 540 nm.

    Please use dark red safelights only !"

    The problem with certain combinations of sensitized materials and safelights relates directly to the spectral sensitivity of the sensitized materials and the spectral output of the safelight. Too high a light output at a wavelength where there is a correspondingly high sensitivity limits the safe exposure time.

    Silver content is not necessarily an indicator.

    C

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