But you are also developing to a higher density as well so a longer development time than would be needed for a normal negative at 2 + 2 to 100. I do or rather have used this dilution when tray processing 10x8 negatives to cut development times while working in the dark.Pyrocat-HD will definitely increase negative contrast at 2:2:100. I use it fairly regularly to produce negatives for pt/pd printing.
Rodinal is capable of producing incredibly good fine grain with films like the old Agfa AP/APX 100 & AP/APX 25 as well as Tmax and Delta films. This comes back to the OP's question of what are good and bad combinations and sometimes we need like for like comparisons.Pyrocat HD at 2+2+100 also increases grain, to the level you get with Rodinal. Not a problem with large format, but it could be with 35mm, depending what you want your prints to look like.
You must have gone there some time (years) later than my visits, he was fully analog last time I visited Duckspool I'd guess 1988 maybe 89.Some of Peter's negs may have been XP1.
He was was an early enthusiast for digital printing and would show you something not much better than a supermarket receipt, with great pride. Events have proved him right of course.
I have only ever used stand development with Caffenol CL and Fomapan 100 and have never noticed any uneven development or other artifacts. I use a Nikkor style tank, 40 mins @75F with 10 initial inversions, then tank sits until end of development. I have no idea if this would work with all the different Caffenol blends out there; I use Sumatra beans purchased from an advertiser on PHOTRIO (old APUG.)Alan how do you stand develop sheet film, I would be worried about uneven development?
If you're not familiar with Steve Sherman, then look up his EMA (extreme minimal agitation) techniques. I believe he uses mostly FP4+ in his photography.I used this method for the Foma 100 and the 200 too. Didn't try FP4 so far, but will give it a try in the future (or maybe someone already tried it and wants to share the information?)