Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 71,940   Posts: 1,585,653   Online: 886
      
Page 2 of 2 FirstFirst 12
Results 11 to 20 of 20
  1. #11
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    23,558
    Images
    65
    There is another and better reference which gives the method for reusing the developer. Basically, you extend the development time for each roll or group of rolls.

    You may want to check that reference out as well.

    PE

  2. #12

    Join Date
    Jun 2007
    Location
    Seattle, WA
    Shooter
    Medium Format
    Posts
    121
    Do you have a reference for this? I looked at all of the Kodak docs available from their website and didn't find anything about extending the development times for C-41. In fact, all of the C-41 papers explicitly stated that one should never reuse the developer (for small quantity processing).

    Thanks.

    Warren Nagourney

  3. #13
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    23,558
    Images
    65
    well, good thing I copied this!

    This is from the C41 process manual. The data is missing from the Kodak web site, but I fortunately have it in my archives.

    Oh, you owe me. I posted this several times before.

    JK.

    PE
    Attached Thumbnails Attached Thumbnails C41 capacity.jpg  

  4. #14

    Join Date
    Sep 2006
    Location
    OH
    Shooter
    35mm
    Posts
    1,789
    Images
    2
    Ahhh I found it!

    http://www.apug.org/forums/viewpost.php?p=968588

    (And I'm way too late)

  5. #15

    Join Date
    Jun 2007
    Location
    Seattle, WA
    Shooter
    Medium Format
    Posts
    121
    Great! Thanks very much.

    wn

    ps. For 120 film (12 exposures), do we use the 126 entry?

  6. #16
    MattKing's Avatar
    Join Date
    Apr 2005
    Location
    Delta, British Columbia, Canada
    Shooter
    Multi Format
    Posts
    12,955
    Images
    60
    Quote Originally Posted by warrennn View Post
    Great! Thanks very much.

    wn

    ps. For 120 film (12 exposures), do we use the 126 entry?
    I can answer that.

    The times relate to the area of the film. 120 film has the same area as a 135-36 roll.
    Matt

    “Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”

    Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2

  7. #17

    Join Date
    Jun 2007
    Location
    Seattle, WA
    Shooter
    Medium Format
    Posts
    121
    Yes, thanks, my question was pretty dumb -- I should have realized that.

    wn

  8. #18
    bvy
    bvy is offline

    Join Date
    Jul 2009
    Location
    Pittsburgh
    Shooter
    Multi Format
    Posts
    998
    Images
    41
    Quote Originally Posted by Photo Engineer View Post
    The Formulary sells repackaged Kodak kits in 1L sizes. I'm using them.
    I assume this is the Flexicolor kit. How is it more conducive to infrequent C41 developing relative to the ones I mentioned in my OP?

    I'm now considering this kit and also the Digibase kit, as they are liquid and not powder based. A more general question: Can I mix smaller amounts of working solutions with these liquid concentrate kits -- say, enough to develop one or two rolls as needed? (I wouldn't even consider this with a powder kit.)

    I would expect the shelf life of the working solutions to be the same no matter what kit I prepare it from.

    Thanks for all the responses.

  9. #19
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    23,558
    Images
    65
    This is a large Kodak C41 kit repackaged under nitrogen into 1L kits. It is no more or less useful for infrequent processing than the size would indicate. It is better than a 20 L kit, in that sense as it lasts longer and keeps better due to packaging and size.

    Once a 20L kit is opened, it begins aging unless opened in an inert atmosphere. The repackaging process does this. Once part of this kit is used it starts aging. The 1L kit can be used as desired with the capacities given above.

    PE

  10. #20

    Join Date
    Nov 2009
    Location
    Capital of Oregon Territory
    Shooter
    Multi Format
    Posts
    783
    Here's my approach for occasional use:

    Use distilled water. Boil it and let it cool just to the right mixing temperature. For 1L and 2L kits, mix all developer at once, separate into gas-impermeable bottles just the right size for your development tank filled to the brim, and put them into the refrigerator. Mark them "C-41 beer. Drink only if desperate." I have not noticed much of a degradation even with 6-9 month old developer stored that way. I'm sure densitometer might disagree, but I doubt it is any worse than Target's under-utilized/under-replenished developer. Bleach, fix and final rinse are better off being mixed right before use, and they last quite a long time as a concentrate anyway.

Page 2 of 2 FirstFirst 12


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin