I have been developing my own bw movie for some time, so far in a Patterson tank and without problems. Recently, I got a used JOBO-2236 Club tank … I've used it a bit, but I've had many more development problems (uneven development, etc.) with the JOBO tank I never had in the Patterson. Interestingly, when two rolls are developed in the JOBO, often only one roll is affected.
Does anyone have any idea what could cause this? Can a tank (which is airtight) have other problems? Can the reels have a problem?
Or does anyone have an idea of what could have caused this?
I attached a sample, the photos were taken on a roll 120 of Rollei RPX25 and revealed in Rodinal 1:50 for 11 minutes. All of my previously shot RPX25s (developed in Paterson) looked great … interestingly, the second RPX25 roll in the same development process is pretty good.
The problems in Pancro 400 in my other publication are also in this tank …