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Thread: "Odd" JOBO tank

  1. #1
    jadphoto
    Join Date
    Feb 2000
    Location
    Solvang, California
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    467

    "Odd" JOBO tank

    Hi All,

    I recently was given a box of darkroom odds and ends. I use a JOBO CPE-2 and series 2500 drums, but in the box was a drum (4541 I believe) that I assumed was a print drum, at least it looked like one. But on the outside it had film and print capacities listed. Can I do sheet film in it? Does it take a special center core, it currently has the little cup that usually is found in the lid of a print drum, does that need to be replaced if processing film?

    I'm puzzled...

    JD

  2. #2

    Join Date
    May 1999
    Posts
    340

    Re: "Odd" JOBO tank

    If I understand it right, if under daylight or paper safelight, to process film or whatever that need total darkness you have to use the center part and tube used on "film drums". AFAIK, print drum "heads" are not light tight.

  3. #3
    jadphoto
    Join Date
    Feb 2000
    Location
    Solvang, California
    Posts
    467

    Re: "Odd" JOBO tank

    Jose,

    On the contrary, print drum heads are light tight. I used to teach color photography and we used them to print with reversal materials. The reversal paper we used needed to handled in total darkness, my students really loved that part.

    Thanks for the reply though.

    I guess I could just fill the available space with reels and not worry about the center core.

    JD

  4. #4
    - CatLABS
    Join Date
    Apr 2012
    Location
    Boston, MA, USA
    Posts
    649

    Re: "Odd" JOBO tank

    4500 drums are an older system of Jobo drums. Some are compatible with the newer Jobo 2500 system lids, and in some cases the 2502 reels fit. The cores are not the same, and the 4500 lids cannot be used on newer drums.

  5. #5

    Join Date
    May 1999
    Posts
    340

    Re: "Odd" JOBO tank

    Yes, my mistake! I have just checked that what I though it was a "wide mouth" really is the uncomplete cap, without the "cup" you mention. I found this -unused- part (the cup) in my closet (I never develop prints in the Jobo... ).

    With the reels I guess the thing will be not light tight. Doesn`t the cup allow for a faster enough filling/drain of the solution? Prewet and longer developing times could help, I think.

  6. #6
    jadphoto
    Join Date
    Feb 2000
    Location
    Solvang, California
    Posts
    467

    Re: "Odd" JOBO tank

    Thanks to you both, I'll try a lid off one of my 2500 tanks. Hadn't thought of that.

    JD

  7. #7

    Join Date
    Jul 2008
    Location
    Surrey UK
    Posts
    98

    Re: "Odd" JOBO tank

    Click image for larger version. 

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    What you ideally need are four of Formatholder 4206 leastwise that is how Jobo intended sheet film to be processed in these tanks.

    I suspect they are long since unavailable but searching found various references to ebay so they do come up now and then, I was lucky enough to find two new old stock ones.

    Although it does not specifically mention the 4541 tank I have a couple of those and they are just slightly extended 4531's

  8. #8
    jadphoto
    Join Date
    Feb 2000
    Location
    Solvang, California
    Posts
    467

    Re: "Odd" JOBO tank

    Thanks Clive,

    I'll keep an eye out, although I had several 2500 tanks and reels so it might not be worth the bother. But then, if the price is right...

    JD

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