I've been shooting 35mm and 120 film "seriously" for several years. I have Zone System development calibrations dialed in for HP5+/HC-110 as well as FP4+/Rodinal, which work fantastic for roll film in my steel daylight tank and reel.
Recently I made the jump to 4x5. I was curious how well the times would translate as agitation is by nature different in daylight tank vs tray development.
So I tested FP4+/Rodinal with a sheet exposed for N development first. Interestingly, when I put the single sheet into the tray in my darkroom, stuck to the same agitation timing as the tank (merely agitating by lifting the corner rapidly for 5 seconds every minute instead of inverting for 5 seconds every minute), the sheet appears to have come out exactly right (no densitometer readings to confirm that the results are exactly the same, but it looks, scans, and contact prints just like my roll film).
However, when I tried developing multiple sheets, agitating by "shuffling" the bottom sheet onto the top X+1 times (where X is the number of sheets in the tray), my results were terribly underdeveloped.
I don't think I'm running into exhausted developer. For a roll of 120, I use Rodinal at 1:50, with 400ml of water and 8ml of syrup. My understanding is that a roll of 120 is roughly equivalent in surface area to a sheet of 8x10 or 4 sheets of 4x5. In the tray, I used the same 400ml of water and 8ml of syrup, and never more than 3 sheets at once, (usually only 2, I shoot pretty low volume).
I also don't think it's a temperature issue, or wouldn't I be seeing the same muddy underdeveloped look in my single-sheet test?
What do you guys think? Am I missing something, or am I better off just bagging it and re-calibrating from scratch for this type of development?
Recently I made the jump to 4x5. I was curious how well the times would translate as agitation is by nature different in daylight tank vs tray development.
So I tested FP4+/Rodinal with a sheet exposed for N development first. Interestingly, when I put the single sheet into the tray in my darkroom, stuck to the same agitation timing as the tank (merely agitating by lifting the corner rapidly for 5 seconds every minute instead of inverting for 5 seconds every minute), the sheet appears to have come out exactly right (no densitometer readings to confirm that the results are exactly the same, but it looks, scans, and contact prints just like my roll film).
However, when I tried developing multiple sheets, agitating by "shuffling" the bottom sheet onto the top X+1 times (where X is the number of sheets in the tray), my results were terribly underdeveloped.
I don't think I'm running into exhausted developer. For a roll of 120, I use Rodinal at 1:50, with 400ml of water and 8ml of syrup. My understanding is that a roll of 120 is roughly equivalent in surface area to a sheet of 8x10 or 4 sheets of 4x5. In the tray, I used the same 400ml of water and 8ml of syrup, and never more than 3 sheets at once, (usually only 2, I shoot pretty low volume).
I also don't think it's a temperature issue, or wouldn't I be seeing the same muddy underdeveloped look in my single-sheet test?
What do you guys think? Am I missing something, or am I better off just bagging it and re-calibrating from scratch for this type of development?

