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  1. #11

    Join Date
    May 2006
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    Brentwood, Contra Costa County, California, USA
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    Quote Originally Posted by Todd Barlow View Post
    I have a stainless steel tank that will hold 2 120 reels but leaves enough space for an additional 35mm reel plus another 1/2 inch or so.

    When I am processing 2 120 rolls I fill the space with an empty 35mm reel and a plastic disk to keep the reels from moving when I agitate by inversion.

    So the question, is the right amount of solution 1) to cover just the 120 reels and leave more than 2 inches of air space or 2) fill the tank and leave some space at the top to allow the solution move around?

    Thanks

    Todd
    I've always filled my tanks to the brim (for 35mm and 120, and even when I used an HP Combi Tank for 4x5) and I've never had any problems with uneven development or air bubbles, etc. I always fill the tank with reels--loaded or unloaded, and pour in at least the tank's liquid capacity of developer. Usually the developer overflows, as I use highly diluted HC110 and Rodinal. Works for me.

  2. #12
    reellis67's Avatar
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    Mar 2005
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    Central Florida
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    One of the problems with filling the tank to capacity is that there is not enough air space to create flow during agitation. There should be *some* space for the solution to move so that there is an exchange of 'fresh' developer for 'old' developer at the surface of the film. In all cases it is my opinion that if your system works for you, stick with it - unless of course you like to experiment.

    - Randy

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