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Thread: Roller developing times, versus inversion?

  1. #1
    3d Visual Effects artist
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    Jul 2007
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    Culver City, CA
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    1,176

    Roller developing times, versus inversion?

    Hello I'm about to start trying roller developing (with a uniroller), I'm curious as to what developing times would be a good starting point? Right now I'm using HC-110 (31:1000 mixture), developing for a total of 10 minutes for a normal 'full' develop, inverting constantly for the first 30 seconds, then 10 times after each minute. I usually under develop a bit, but this is what I use when I want a full 'normal' develop.

    Any idea how what a good starting place would be, for how long I let the uniroller go for? Surely 10 minutes would be to long, should I cut that in 1/2 and try 5 minutes for my first pass at it?

    Thanks for any guidance!
    Daniel Buck - 3d VFX artist
    3d work: DanielBuck.net
    photography: 404Photography.net - BuckshotsBlog.com

  2. #2

    Join Date
    Sep 2003
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    1,791

    Re: Roller developing times, versus inversion?

    Cut 10-15% to start then test. You may need less or more. The unblinkingeye website has[had?] an article on this. Some film/developer combinations needed more time then others.

  3. #3

    Join Date
    Feb 2007
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    SF Bay Area, CA
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    50

    Re: Roller developing times, versus inversion?

    With Ilfotec DD-X in a Unicolor print drum, my trial and error led me to reduce times by 20% (compared to the published recommendations).

    -Vijay

  4. #4
    Retired Pirate
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    Apr 2007
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    110

    Re: Roller developing times, versus inversion?

    I use -15% of time, plus an extra 25% plain water. Works for me, using Rodinal or Ilford DDX.

  5. #5
    jetcode
    Guest

    Re: Roller developing times, versus inversion?

    Quote Originally Posted by Daniel_Buck View Post
    Hello I'm about to start trying roller developing (with a uniroller), I'm curious as to what developing times would be a good starting point? Right now I'm using HC-110 (31:1000 mixture), developing for a total of 10 minutes for a normal 'full' develop, inverting constantly for the first 30 seconds, then 10 times after each minute. I usually under develop a bit, but this is what I use when I want a full 'normal' develop.

    Any idea how what a good starting place would be, for how long I let the uniroller go for? Surely 10 minutes would be to long, should I cut that in 1/2 and try 5 minutes for my first pass at it?

    Thanks for any guidance!
    Daniel,

    What I found extremely useful is the following:

    1) Use a step card (mine has 4 calibrated shades of B/W that map to the tone scale)
    2) Expose 8 sheets of film using different ISO settings (from recommended to lower)
    3) Develop each sheet individually starting with a base development time

    I guarantee by the time you reach sheet 4-5 you will know exactly the working ISO for that film in that light setting (I used late afternoon direct sunlight for my test)

    If I shoot in a scene that has not been calibrated then I make sure I have 4 sheets exposed so I can develop each one individually until I reach perfect development

    I call it a working mans film test because it didn't come from any book and my guess is there are far superior ways to test film and development cycles.

    Oh and I use the uniroller to process 4x10 sheets
    Hope that helps - Joe

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