Emulsion Sensativity Question

Discussion in 'Silver Gelatin Based Emulsion Making & Coating' started by Stephen Frizza, Nov 14, 2007.

  1. Stephen Frizza

    Stephen Frizza Member

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    I own and operate a small pro lab in Sydney australia.
    Many of my clients either travel overseas or are based over
    seas and send their work to me. I have noticed a pattern relating to emulsions which I am hoping someone else may have noticed or have some idea as to
    weather what I am noticing is coincidence or has a science behind it.

    When I get mixtures of films including Black and white emulsions and colour E-6, C-41 emulsions I find if they have been exposed to a damaging level of X-rays
    there is a trend for the black and whites to be damaged most often followed by lesser damage on the c-41 and then rarely on E-6.

    This observation has made me wonder is this just a coincidence in my lab? or is there a science behind black and white emulsions being more sensitive to X-ray damage, c-41 less so and E-6 less so again?

    If so can someone explain this too me? as ive noticed this pattern often.

    ~Steve Frizza
    The Lighthouse Lab
     
  2. boyooso

    boyooso Member

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    What is the damage you see?

    I imagine it is base fog on the B&W?

    Corey
     
  3. Stephen Frizza

    Stephen Frizza Member

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    no X-ray damage from airports is usually a wavy fog. I will scan some late for those who have not seen it.
     
  4. Kirk Keyes

    Kirk Keyes Member

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    Mods- this post seems more like a general film question and not an emulsion making question, could this be moved?
     
  5. Stephen Frizza

    Stephen Frizza Member

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    I felt it best to ask to emulsion makers as they may know what variant causes this? i.e in terms of weather in emulsion manufacturing there is a reason behind my observation.