Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 71,901   Posts: 1,584,485   Online: 1000
      
Page 2 of 2 FirstFirst 12
Results 11 to 20 of 20

Thread: C-22 recipe?

  1. #11
    StoneNYC's Avatar
    Join Date
    Aug 2012
    Location
    Connecticut, USA
    Shooter
    8x10 Format
    Posts
    7,988
    Images
    226
    Quote Originally Posted by Rudeofus View Post
    If you develop these negs as b&w negs, color crossover is hardly an issue. If you do the full C41 process, you need to balance three color layers in lock step, which, according to those who tested this with control strips, can only be done at 38°C/100°F but not at room temperature. If you go the hybrid route, digital post processing software can restore the correct colors and often does it automatically, so you'll never notice that your C41 negs weren't developed correctly. You will notice it, though, once you try to enlarge optically, since you can't adjust contrast of individual color layers that way.
    I see, I don't know the method he used. I assume it was a scan, the reds were really great and browns true, the scenes were of a sandy beach and a red boat or tractor or something.


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

  2. #12

    Join Date
    Feb 2009
    Location
    Mission Viejo, California
    Shooter
    127 Format
    Posts
    1,490
    Most all color film prints come from scans these days.

    Given the choice of developing a found roll of C-22 in black and white or cold C-41 I would choose the method that can produce color prints.

    I would see no reason to shoot an unused roll of C-22 besides just curiosity.
    - Bill Lynch

  3. #13
    cmacd123's Avatar
    Join Date
    May 2007
    Location
    Stittsville, Ontario
    Shooter
    35mm
    Posts
    1,136
    Quote Originally Posted by Photo Engineer View Post

    All Kodak color products use oil dispersed couplers. In C22, the CD3 was less active and the couplers were older versions. In C41, the CD4 is much more reactive and the couplers are as well. No BZA is needed in either C41 or RA4 due to the coupler activity.

    Benzyl Alcohol increases image spread and reduces sharpness.
    So assuming one has a roll of Kodacolor-X found in an old camera. and assuming that said crazy person only has access to the Jobo/Unicolor dry chemical C-41 Kit. (as you can't mail liquid developer it seems) BUT DOES have some old Benzyl alcohol. Would a reasonable approach be to add 5ml per liter of BZA to the Unicolor Colour developer. (I would be using a Jobo Rotary Processor so I a actually wasting about 4 oz per roll of each chemical assuming nothing useable comes out.) Then Using the Old C-22 Times at 75 Degrees F.

    My alternative would be to try and mix some variant of the C-22 Formula, but I only have some old CD-4 and again I don't know where I could get some CD-3 sent to me because of the cross border chemical mail problem. To do that I would need to know a conversion factor between CD-3 and CD-4.

    {background, Many years ago I used a formula from a fellow named Dale Nevile That used CD-4 to develop both C-41 and ECN-2 Film. THEN saving the once used developer, it was mixed with a small amount of BZA and diluted with equal parts Water. The Bilx from his formula was also diluted 50-50 and low and behold, used to develop EP-2 colour paper. ANd yes I do have one print on Agfa EP-2 paper displayed in my front hall where it gets a lot of light and it has not faded too much in 20 years.}

    {If I can find his newsletter I think he had a formula or c-22, but all his formulsa were based on measuring stuff with a specific set of measuring spoons. and I think my set is no longer complete. so I would want to avoid that third alternative if I can.}
    Charles MacDonald
    aa508@ncf.ca
    I still live just beyond the fringe in Stittsville

  4. #14
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    23,544
    Images
    65
    What you propose might be possible, but the dye hues and image stability would be off and you would likely get crossover.

    PE

  5. #15
    Rudeofus's Avatar
    Join Date
    Aug 2009
    Shooter
    Medium Format
    Posts
    1,825
    Images
    10
    Quote Originally Posted by cmacd123 View Post
    My alternative would be to try and mix some variant of the C-22 Formula, but I only have some old CD-4 and again I don't know where I could get some CD-3 sent to me because of the cross border chemical mail problem. To do that I would need to know a conversion factor between CD-3 and CD-4.
    There is a reasonable chance you can get RA4 chemistry, and its color developer is a CD-3 based developer which you can modify to your needs. If you get one of these home RA4 kits, they even have one part which is mostly CD-3 ...
    Trying to be the best of whatever I am, even if what I am is no good.

  6. #16

    Join Date
    May 2011
    Location
    MA, USA
    Shooter
    Large Format
    Posts
    1,286
    Images
    19
    Quote Originally Posted by cmacd123 View Post
    So assuming one has a roll of Kodacolor-X found in an old camera. and assuming that said crazy person only has access to the Jobo/Unicolor dry chemical C-41 Kit. (as you can't mail liquid developer it seems) BUT DOES have some old Benzyl alcohol. Would a reasonable approach be to add 5ml per liter of BZA to the Unicolor Colour developer. (I would be using a Jobo Rotary Processor so I a actually wasting about 4 oz per roll of each chemical assuming nothing useable comes out.) Then Using the Old C-22 Times at 75 Degrees F.
    Who says you cannot mail liquid developers?

    We are working on the release of this kit http://www.catlabs.info/product/catl...try-kit-5l-10l which can be mailed to anywhere in the US, and later will also be available for international shipping.

    But like WBLYNCH said above - why not just shoot fresh color film and help film makers stick around a little bit longer...?
    CatLABS of JP
    Darkroom resources and service

    www.catlabs.info | https://www.facebook.com/CatLABS.of.JP | www.jobo-usa.com

  7. #17
    cmacd123's Avatar
    Join Date
    May 2007
    Location
    Stittsville, Ontario
    Shooter
    35mm
    Posts
    1,136
    Quote Originally Posted by Photo Engineer View Post
    What you propose might be possible, but the dye hues and image stability would be off and you would likely get crossover.

    PE
    which proposal? The BZA in the unicolor C-41 Kit or something whipped up with CD-4?

    Any roll that says Kodacolor-X has got to have mixed up colour by now.
    Charles MacDonald
    aa508@ncf.ca
    I still live just beyond the fringe in Stittsville

  8. #18
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    23,544
    Images
    65
    The use of C41 developer for C22 films can work, but will suffer from a lot of problems, not to mention the keeping problems associated with expired film.

    PE

  9. #19
    cmacd123's Avatar
    Join Date
    May 2007
    Location
    Stittsville, Ontario
    Shooter
    35mm
    Posts
    1,136
    Quote Originally Posted by CatLABS View Post
    Who says you cannot mail liquid developers?
    We are working on the release of this kit....., and later will also be available for international shipping.
    Please let me know when "Later" comes.

    Quote Originally Posted by CatLABS View Post
    why not just shoot fresh color film and help film makers
    The question was in connection with a roll of film found in a camera. I would not think of actually USING a roll of C-22 film these days. In this case there is a roll of Kodacolor-X 127 that I found with a camera, and my moderate level of curiosity makes me wonder if there is any recoverable information. If I get the 50 foot roll or 2 of 46mm HP5+ I ordered from the ILFORD ULF run, the spool and backing paper of the Kodacolor-x will be of interest to me - so if I am having to decide if I can and will run a low cost experiment on the film I found.
    Charles MacDonald
    aa508@ncf.ca
    I still live just beyond the fringe in Stittsville

  10. #20
    cmacd123's Avatar
    Join Date
    May 2007
    Location
    Stittsville, Ontario
    Shooter
    35mm
    Posts
    1,136
    Quote Originally Posted by Photo Engineer View Post
    The use of C41 developer for C22 films can work, but will suffer from a lot of problems,
    So you are suggesting straight C-41 developer then - Without the BZA?
    Charles MacDonald
    aa508@ncf.ca
    I still live just beyond the fringe in Stittsville

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