Detective work...

Discussion in 'Color: Film, Paper, and Chemistry' started by Ed Sukach, Feb 17, 2009.

  1. Ed Sukach

    Ed Sukach Member

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    After a slight hiatus from my darkroom, due to a particularly nasty stomach virus, I downloaded film from my drying rack... cutting and placing it in negative preserver sheets.
    Nothing out of the ordinary here, until...
    The last roll of 35mm (36 exp.) was completely solid density .. and I mean about 10.0 +. Solid, no indication of frame numbering or any sort of space where there would normally be base fog.
    I am at a loss to explain this -- it would have to be a MAJOR "light strike" - one I don't think I would have missed - or -

    1. Processing color film in black and white chemistry (Rodinal 1:50).

    2. Processing black and white film in color chemistry (C41).

    3. Plain old pouring the wrong stuff into the tank...

    4. Curses from long dead brittle Puritans who work to prevent nudes from being brought into existence ...

    5. "Nov smoz ka pop!" - something else I am missing - totally.

    Your thoughts, guys...? What would cause total black - everywhere?
     
  2. archphoto

    archphoto Member

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    Slide film in the wrong chemistry ?

    Don't know what you are shooting normaly and what kind of chemicals you use > Rodinal OK, but allso C41 and E6 ?

    Peter
     
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    Ed Sukach

    Ed Sukach Member

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    I haven't done E6 in the last two or three years, either taking or developing - the last was processed in a top-grade (or so it was at the time) commercial lab.

    C41 chemistry is from the Unicolor Powder Kit, from Freestyle. Other C41 processed at that time with this chemistry was OK.

    Upon closer examination, the film is from a commercially loaded cartridge, not from the bulk loaded batch I made.

    This film was processed in a JOBO CPP2, with 15xx series tanks loaded with two films on two reels at time, both in b&w and C41. Only one film was affected; the other one in that tank at that time must have been OK.

    Baffling. At present, I'm leaning toward idea #4.
     
  4. archphoto

    archphoto Member

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    It could be C41 in Rodinal and fix or a roll that has been in total light.

    Have you tried to put a bit of film into C41 bleach? You can use some old bleach and see what it does....
     
  5. Photo Engineer

    Photo Engineer Subscriber

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    Any color film in B&W chemistry will give a very orange yellow negative image. Any B&W film in color chemistry will give a blank piece of film with no image whatsoever.

    PE
     
  6. MattKing

    MattKing Subscriber

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    An unexposed but properly developed roll of transparency film is pretty black :smile:.

    Can you see the edge printing?

    Matt

    Edit: Oops - missed the reference to no edge marking - Thanks PE
     
    Last edited by a moderator: Feb 18, 2009
  7. Photo Engineer

    Photo Engineer Subscriber

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    As he said, no edge marks. That is why I posted what I did. The film is totally black and therefore eliminates two of the choices as I indicated.

    Edge markings would be visible in the two cases I cite above.

    PE