Stabilization B&W processing.

Discussion in 'Darkroom Developing and Printing' started by NapperWm, Jul 11, 2003.

  1. NapperWm

    NapperWm Guest

    Hello,

    Word is that you can process polycontrast rapid Rc III via a stabilization
    processor.
    Is this true?
    What actually occurs in the stabilization process?
    Maybe you could convert it to a RA4 color processor?

    Bill
     
    NapperWm, Jul 11, 2003
    #1
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  2. I think perhaps you are confusing an activation processor
    with stabilization processing. Both are meant for fast
    processing times and both use paper with an incorporated
    developer.
    The stabilization process involves treating the paper in a
    stabilizing solution instead of fixing and washing it. The
    stabilizer converts the unused silver halides to a form
    which is colorless and does not darken for some time,
    however, the images are not permanent. Stabilization does
    not work well with RC because it depends on the paper base
    of conventional paper to act as resevoir for the stabilizer.
    Stabilized prints have a life of weeks to perhaps a few
    years depending on storage conditions. They can be made more
    permenent by subsequent fixing and washing.
    RC paper can be fixed and washed so quickly that
    stabilization processing offers no advantage.
    Activation development requires the paper to have
    developer incorporated in the emulsion. Most RC papers do.
    The activator is essentially a strongly alkaline solution
    with some sulfite in it to prevent developer reaction
    products from causing staining. The development is rapid but
    the maximum black is not quite as good as with normal
    development. When used with activation development and rapid
    fixer processing time of RC paper is perhaps no more than
    five minutes. With an added infrared dryer the dry to dry
    time is only about six to eight minutes.
    Polycontrast III RC has incorporated developer so can be
    activation processed.
    I don't think stabilization processors have enough stages
    to do RA-4 but could be wrong.
     
    Richard Knoppow, Jul 11, 2003
    #2
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  3. NapperWm

    elemar Guest

    : :> Hello,
    :>
    :> Word is that you can process polycontrast rapid Rc III via
    : a stabilization
    :> processor.
    :> Is this true?
    :> What actually occurs in the stabilization process?
    :> Maybe you could convert it to a RA4 color processor?
    :>
    :> Bill

    : I think perhaps you are confusing an activation processor
    : with stabilization processing. Both are meant for fast
    : processing times and both use paper with an incorporated
    : developer.
    : The stabilization process involves treating the paper in a
    : stabilizing solution instead of fixing and washing it. The
    : stabilizer converts the unused silver halides to a form
    : which is colorless and does not darken for some time,
    : however, the images are not permanent. Stabilization does
    : not work well with RC because it depends on the paper base
    : of conventional paper to act as resevoir for the stabilizer.
    : Stabilized prints have a life of weeks to perhaps a few
    : years depending on storage conditions. They can be made more
    : permenent by subsequent fixing and washing.
    : RC paper can be fixed and washed so quickly that
    : stabilization processing offers no advantage.
    : Activation development requires the paper to have
    : developer incorporated in the emulsion. Most RC papers do.
    : The activator is essentially a strongly alkaline solution
    : with some sulfite in it to prevent developer reaction
    : products from causing staining. The development is rapid but
    : the maximum black is not quite as good as with normal
    : development. When used with activation development and rapid
    : fixer processing time of RC paper is perhaps no more than
    : five minutes. With an added infrared dryer the dry to dry
    : time is only about six to eight minutes.
    : Polycontrast III RC has incorporated developer so can be
    : activation processed.
    : I don't think stabilization processors have enough stages
    : to do RA-4 but could be wrong.
    : --

    : ---
    : Richard Knoppow
    : Los Angeles, CA, USA
    :

    Years ago I did use a spiratone stabilization processor with ektamatic paper
    and it worked fairly well. I did fix the prints later, and they have lasted.
    Some of them are 30+ years old and going strong.

    I tried the machine with a developer incorporated RC paper and it worked,
    but the prints started turning brown minutes after they exited the machine.
    By fixing them right after they exited the machine, I cured that problem.

    I soon gave that up since I really wasn't saving any time over conventional
    processing for the RC paper.

    Ray
     
    elemar, Jul 11, 2003
    #3
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