Pyro for deep tank processing??

Discussion in 'B&W: Film, Paper, Chemistry' started by PHOTOTONE, Dec 10, 2007.

  1. PHOTOTONE

    PHOTOTONE Member

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    I would like to use a Pyro based developer to process sheet film on hangars in a deep tank. I wonder if there is one suitable??..or perhaps any of them would be. 3.5 gallon tank. I know it would still be a one-shot developer, but I normally have too many sheets to process at once to do this processing in a tray or tube. I could do "almost" continuous agitation.
     
  2. David A. Goldfarb

    David A. Goldfarb Moderator Staff Member Moderator

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    I use ABC pyro in 5x7" tanks (4 and 5 quarts) when I have a lot of processing to do. I find I can consistently put three batches of hangers through the developer, as long as I have them lined up and ready to go and mix the pyro in just before the first batch. By way of comparison Michael Smith says he runs two batches through ABC pyro in trays, but in a tank there is more volume of solution per sheet and less surface exposed to air relative to the amount of developer and probably less churning when lifting the hangers every 15 seconds, as opposed to shuffling a stack in a tray.