I tend to do my processing using either a small (1x120 reel) AP tank or a medium-size (2x120 reels) Paterson inversion tank.
However, I'm currently using my 6x9 cameras a lot with the result that development work is piling up. I have fewer opportunities to do my processing, too. Therefore I'm considering buying one of those big Paterson tanks, which can fit 3, 5 or 8 (I believe) 120 reels:
patersonphotographic.com
I think I read somewhere, however, that these give uneven results, due to developer gradients inevitably forming along the height of the column even when using regular inversion/agitation patterns, which (again, no personal experience, just internet hearsay) seems to lead to poor results for the reel sitting on top?
What have people's experiences been with these large tanks ? Does using one of these really lead to some compromises in the results?
However, I'm currently using my 6x9 cameras a lot with the result that development work is piling up. I have fewer opportunities to do my processing, too. Therefore I'm considering buying one of those big Paterson tanks, which can fit 3, 5 or 8 (I believe) 120 reels:
Super System 4 Multi-Reel Tanks Developing Tanks – Paterson Photographic Equipment
Worldwide Paterson is best known for the high quality darkroom equipment it manufactures here in the UK. In the late 80s it also took over the manufacture of Benbo Tripods and has continued to develop this range of tripods, beloved by both Landscape and Natural History Photographers.
I think I read somewhere, however, that these give uneven results, due to developer gradients inevitably forming along the height of the column even when using regular inversion/agitation patterns, which (again, no personal experience, just internet hearsay) seems to lead to poor results for the reel sitting on top?
What have people's experiences been with these large tanks ? Does using one of these really lead to some compromises in the results?
Last edited:

It's nice to use, especially when you have dozens of rolls to get through. It's a lot of processing chems, though! If I used that tank a lot, I would probably be happy to use Pyrocat-HD, or XTol-R, for their economy. As a side note, I just developed three 120 colour films in it and they all turned out quite nice.
