Kodak Sepia Toner under safelight?

Discussion in 'Kodak' started by Chase Martin, Aug 31, 2004.

  1. Chase Martin

    Chase Martin Guest

    I've used Kodak's Sepia Toner (2 bath, regular and warmtone) for 10
    years. I just noticed on the label that the bleach and toning should
    be done in the dark with only safelights. Huh? I've always toned
    with room lights on, evidently without any problems.
    Anyone know why the new procedure (lights out) on the newer labels?
    Chase Martin, Aug 31, 2004
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  2. The reason you never noticed the instruction is that its
    fairly new. It was begun with Kodak Sepia II toner. I talked
    to Thom Bell at Kodak and he confirmed my guess about it.
    Here is the reason: when you bleach the image it is
    converted to silver bromide. Silver bromide is sensitive to
    light and can be converted to metallic silver by the action
    of strong light. This is called photolytic silver and the
    effect can be seen on any unprocessed photographic material
    left in strong sunlight. The idea of using a safelight is to
    prevent the generation of photolytic silver in the bleached
    image. However, its really overkill. Normal room lighting
    isn't going to generate enough photolytic silver to be
    significant. So, in theory, using a safelight is a good
    idea, in practice, it really isn't necessary. But, toning in
    daylight is probably not a good idea.
    Richard Knoppow, Aug 31, 2004
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  3. Chase Martin

    Chase Martin Guest

    Thanks for the efforts, Richard. That echoes my thoughts. I'll
    continue to leave the room lights on.
    Chase Martin, Aug 31, 2004
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