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  1. #21
    Roger Cole's Avatar
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    I use the presoak with rotary tube processing. The only unevenness I have ever seen was when I was using the slow speed on my CPE2. Jobo later recommended against this speed (for roll film) and removed it from the CPE2+. Even then it was rare and I only saw it in a couple of frames with ocean and sky on one roll. I switched to the fast speed and haven't seen a problem with roll film since.

  2. #22
    Ian Grant's Avatar
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    Quote Originally Posted by PKM-25 View Post
    Not entirely, I pre-wet FB when I do 20x24's in my Jobo 3063 drum, it has eliminated the developing streak I sometimes had when I did not pre-wet.
    There's always exceptions to general recommendations and it makes sense and has always been recommended by most manufacturers to use a pre-soak with rotary processing.

    A pre-soak is also recommended fror colour film processing, more here as a tempering bath to bring the tank/film to the working temperature.

    Ian

  3. #23
    baachitraka's Avatar
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    Quote Originally Posted by noacronym View Post
    You presoak film to dissolve the anti-halation backing, and to bring the tank and reel to working temperature. It would be totally pointless to bust your tail to get your developer temperature on the money, and then pour it in to a cold taknk, or a hot one. So you presoak with water of the same temperature as the developer is going to be.
    Yes, Fomapan 400 in 120 can throw green vomit after two minutes of presoak @ 20°C.
    OM-1n: Do I need to own a Leica?
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  4. #24

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    Quote Originally Posted by AndreasT View Post
    I am not sure what paper it was, either Agfa MCC, or Ilford Fb where you can presoak it to wash out the incorporated developer.
    Can't speak for Agfa MCC but I can say that Simon Galley of Ilford has said that there is no incorporated developer in Ilford FB so whatever you were washing out, it wasn't that. You'd think that if anything needed washing out, Ilford would mention it in its very comprehensive instructions and it doesn't as far as I can recall.

    pentaxuser

  5. #25
    Ian Grant's Avatar
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    Quote Originally Posted by pentaxuser View Post
    Can't speak for Agfa MCC but I can say that Simon Galley of Ilford has said that there is no incorporated developer in Ilford FB so whatever you were washing out, it wasn't that. You'd think that if anything needed washing out, Ilford would mention it in its very comprehensive instructions and it doesn't as far as I can recall.

    pentaxuser

    It would be Ilfoprint or Agfa Rapid both RC papers designed for rapid access processing, but not a FB paper.

    Ian

  6. #26

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    Quote Originally Posted by Jon Shiu View Post
    Re: pre-rinsing film

    In the Ilford instructions it says a pre-rinse is not recommended due to possible uneven development.

    Jon
    For rotary processing.

  7. #27
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    Quote Originally Posted by pentaxuser View Post
    Can't speak for Agfa MCC but I can say that Simon Galley of Ilford has said that there is no incorporated developer in Ilford FB so whatever you were washing out, it wasn't that. You'd think that if anything needed washing out, Ilford would mention it in its very comprehensive instructions and it doesn't as far as I can recall.

    pentaxuser
    No clue what it is. Could be an accelerater??? All I know it worked. May have been MCC. Although it still wasn't that nice after Lithing.

  8. #28
    David Lyga's Avatar
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    Although this will probably affect no one, due to its esoteric nature, I will say this anyway: if you pre-soak Kodak ImageLink Film (Microfilm) you will completely wash away the image and get blank results. - David Lyga

  9. #29

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    Both Kodak and Ilford do not recommend that you presoak their films.
    I do wish that people would READ posts carefully before they respond. I was very careful to say "do not recommend." Now this may simply mean that they consider pre-soaking unnecessary. BUT there may be a definite, unspecified reason for stating this. I personally assume the latter reason.

    In general I wish people would read posts more carefully as many misunderstandings arise from this.
    Last edited by Gerald C Koch; 04-09-2013 at 10:25 AM. Click to view previous post history.
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  10. #30
    MarkL's Avatar
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    I often do quick print sessions of only one or two sheets and want to use a reasonably minimal amount of developer. So I will presoak the paper, usually for less than a minute, so that it softens and is ready to lie flat in the developer without the corners curling up. This is especially important with 16x20 and 20x24 where you really don't want to be flipping the paper if you don't have to.

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