All, Been getting back into B\W processing and using Ilfosol-S with HP-5 and FP-4 films. The info sheets for Ilfosol-S state that for a 500 ml bottle, it will process 16 36 exposure films (250mlx2). What is the capacity for 120? I used to know this but for the life of me I cannot think of it. Any Ilford fans out there? I also have some DD-X and want to try that with HP-5 but I wanted to use the Ilfosol first so I can compare. My reasoning is that the DD-X will probably be just for HP-5 and the Ilfosol will be for the FP-4.