C41 and CPE2

Discussion in 'Color: Film, Paper, and Chemistry' started by richard littlewood, Aug 25, 2010.

  1. richard littlewood

    richard littlewood Member

    Messages:
    146
    Joined:
    Jan 17, 2005
    Location:
    Pennines
    Shooter:
    4x5 Format
    Hi all

    I'm about to dive back (after 25 years) into C41. I'll be using 5x4 and 120, and a CPE2 with 2553 tank, 5x4 holders and 120 spirals. I'm also going to try the Rollei Digibase chems, and film will be Portra's.
    I'm used to B+W film/chemistry in the Jobo, and 5x4 works well (4 sheets per spiral) but using the 120 reels, with certain films there can be a ruinous density build up down both long sides of the film. I assume this is localised over agitation where the film meets the spiral - anyone else noticed this?
    Does colour film/chems work in the same way? Is it as responsive to agitation like B+W film is, or is it purely the time it spends in the dev that determines density.
    I know I'll have to run a few tests, but while I'm waiting for the chems to arive it would be good to hear from other C41/CPE2/120 users, and how you rate the negs.

    Cheers
    Richard
     
  2. fotch

    fotch Member

    Messages:
    4,824
    Joined:
    Mar 16, 2005
    Location:
    SE WI- USA
    Shooter:
    Multi Format
    Richard, what films are you talking about? "with certain films there can be a ruinous density build up "

    Using Kodak or Ilford, I never notice any problems.
     
  3. richard littlewood

    richard littlewood Member

    Messages:
    146
    Joined:
    Jan 17, 2005
    Location:
    Pennines
    Shooter:
    4x5 Format
    I've noticed this edge build up with FP4, but the worst case is Foma 100. I think this film is really agitation sensitive.

    Sometimes it's possible to see, in this density area, shapes that match the many notches round the spirals.

    Also it seems like a classic cpe2/film dev issue - some people reckon they get flawless negs, and others are plagued by un-even dev issues. I went back to inversion deving with 120 because of this.

    Richard
     
  4. Sirius Glass

    Sirius Glass Subscriber

    Messages:
    20,591
    Joined:
    Jan 18, 2007
    Location:
    Southern California
    Shooter:
    Multi Format
    Are these problems with the 1501 plastic reels or the 1502 stainless steel reels?