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  1. #21
    AgX
    AgX is offline

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    There was no Agfa patent that blocked introduction of process C-41 by Kodak.

    To the contrary, it was Kodak that together with that new process even introduced new types of couplers.

  2. #22

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    Hi all,
    Just to give a feedback :

    Taken the jump with my Agfa CNS roll ; I tried 9 min in HC110 dilution B.
    The film come out completely back, and was problably exposed to daylight before.
    It was a try and it's a miss !

    Thanks you to all,

    Best regards,

    Raphael

  3. #23
    Stephanie Brim's Avatar
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    For anyone else who has this problem...

    I would suggest stand development in either a more diluted D-76 variant or HC-110 at something like 1 part dev to 99 parts water. I have done older film before that I found in cameras and this is what worked the best. Does not work well with slide film, but seems to work well with most color films of questionable nature.
    No idea what's going to happen next, but I'm hoping it involves being wrist deep in chemicals come the weekend.

  4. #24
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    What film is this and which process to develop it?

    Quote Originally Posted by nworth View Post
    Films that used the C-22 process had oily couplers that required benzyl alcohol in the developer. Agfa held patents on those that didn't need this special solvent. After the patents expired everywhere, we got C-41.

    C-22 developer
    This is quoted in the reference as the official Kodak formula for C-22 developer.

    Water 800 ml
    Benzyl alcohol 5 ml
    Foamex 0.01ml (anti-foam agent)
    Calgon 2.5 g (sodium hexametaphosphate)
    Sodium sulfite 1.85g
    Sodium bromide 1.4 g
    Potassium iodide 0.5 mg (500 micrograms)
    Borax (decahydrate) 58.8 g
    Sodium hydroxide 12.5 g
    CD-3 5 g
    Water to make 1 l

    pH at 75F = 10.7
    Develop the old Kodacolor (C-22 process) about 13 minutes at 75F.
    Ref: Dignan Photographic Newsletter, January 1974
    Holy crap dude! I've been looking for this forever!!

    See...

    http://www.apug.org/forums/forum40/111431-1950s-film-agfacolor-ultra-k-40-asa-fomachrome-orwo-color-kodacolor-x.html

    Also, have any formulas for CN-17 and ORWO color transparency developer? Need both, going I make some batches...

    Is there a book somewhere that has all the old formulas for home mixing? I have a lot of expired film (like 30-50 years old) and the B&W stuff I've just experimented and figured it out, but even if the colors are all messed up I want to develop it as color to see what I get.

    Any info appreciated


    ~Stone

    The Important Ones - Canon: AE-1, 1V | Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic | Mamiya: RZ67 Pro II, 7 II

    Sent from my iPhone using Tapatalk
    ~Stone | "...of course, that's just my opinion. I could be wrong." ~Dennis Miller

  5. #25

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    Hi all,

    Just found another film in an older camera, a B&W one, this time !

    I will open another thread into this forum on the subject.

    Regards,

    Raphael

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