Mowrey's AZO in Camera

Discussion in 'Silver Gelatin Based Emulsion Making & Coating' started by holmburgers, Feb 14, 2012.

  1. holmburgers

    holmburgers Member

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    Here are the results of shooting an emulsion made in October at the GEH workshop with Ron Mowrey and Mark Osterman, in a camera.

    One coating was done on subbed-melinex and the other on strathmore bristol paper, I believe.

    Shot on a sunny day at 4 in the afternoon; Pentax spotmeter read 16 on the stone and 13.5 on the roof, indicating an exposure of 14 for me.

    f/32

    60 seconds for the paper
    70 seconds for the film (got distracted...)

    All told, I'm really digging this! The paper negative came out very strong and the neg seemed thin, though there's plenty of information on there, just not a lot of density. I'm quite curious about this..

    My plan is to make a carbon print from the paper neg; a gift for my friends who were married in this building about a year ago.

    However, the paper grain hides the resolution of this emulsion, which on the film is dang impressive. Coating flaws detract from it, but hey.. cut a guy some slack.

    No matter what happens to film production, I know how to make this... and that makes me so happy.

    *picture 1* - detail from film
    *picture 2* - film negative
    *picture 3* - positive from film neg
    *picture 4* - paper neg
    *picture 5* - positive from paper neg

    The positives are just flipped scans, not prints.
     

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  2. Kevin Caulfield

    Kevin Caulfield Subscriber

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    Great result. Nice work and congratulations.
     
  3. fotch

    fotch Member

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    Amazing, really nice.
     
  4. holmburgers

    holmburgers Member

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    Thanks gents, appreciate the kind words.
     
  5. holmburgers

    holmburgers Member

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    Maybe Ron's reading this and can shed some light...

    I remember a cautionary note about coating this emulsion on film; since it's non-absorbent the excess salts(?) won't absorb down into the fibers. One result is crystallization, but what else might that do?

    In person, the paper negative is much denser than the film. Why might this be, considering that the exposures were approximately equal and even a bit longer on the film?
     
  6. yeknom02

    yeknom02 Member

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    I would just like to express my envy... Some day I will be able to take one of those workshops...
     
  7. T-grain

    T-grain Member

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    the paper negative is denser probably due to the fact that it has a reflective surface-actually, you "harvest" the light (almost) twice, hence more emulsion speed


     
  8. holmburgers

    holmburgers Member

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    T-grain, that makes a lot of sense. Gracias!
     
  9. keithwms

    keithwms Member

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    That's really terrific, very encouraging. Keep up the great work!
     
  10. A_Caver

    A_Caver Member

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    Very nice

    Looks very good, and fine detail