So I'm overseas right now and have blasted through my big bag of Fomapan 400. Oops. My only option to buy here is TMY, so I bought a pile. How can I try to nudge the character into Foma or even Tri-X territory so there is some continuity in my total story? I know this is a terrible question, but I don't have much choice. I generally develop in Rodinal 1:50 with normal to light agitation and print somewhat hard on Ilford MG FB paper. As you may have guessed, I am not afraid of grain.

Thank you!!!
hi silvergelatin
i am oblivious to curves and lines and logs but have experience shooting tmax100 and tri x .. the 4x5 and
35mm adn 120 flavor, not much experience exposing fomapan so you can
take my suggestions at face value, or for what they are worth ( barely the time it took me to type it

)
i have never used rodinal or D76, but i have experience with dektol, ansco 130 & caffenol c, and those films
.. ( while i could also say a few more developers, i wouldn't waste any my efforts with them )
what i have done to convert my tab grained film to something a little more traditional is one of a handful of
things ...
over expose it a little bit ( since it is 35mm you can under expose a little too, if you want to, just
bracket 
)
caffenol c with a little dektol or ansco 130 in it does wonderful things to film, i'd suggest making a strong
brew of caffenol c ( use teaspoons/tablespoons a scale, its OK, its a forgiving developer, add extra if you
want, your film won't explode ) and add a "splash"
of dektol/ansco 130 in it .. whats a splash ? when you could measure it and it would be about 20cc +/- /L
or you can just tip the bottle of stock solution and pour a little out. years ago a cousin of mine used to drink
a "scotch splash" the splash was water and it varied a little depending on the barkeep he asked for the drink
but all in all every time it was just about the same ...
process your film ( roll film ) normally for IDK 10-11 mins .. ( you could do a test roll and modify your times
from there )
presoak in water for 1 min, knock the bubbles off agitate 1 full min and 10sec/min sheet film? continuously agitate for the whole time..
you could also just pour the developer in the tank, after presoak, knock the bubbles off, agitate 1 full min and
don't do anything for about 1/2 hour .. then come back and agitate for 1 min before you stop/wash...
this works with sheets as well as it does with rolls.
2 left ....
my next is a take on a divided developer ...
you have your print developer spiked caffenol c ... now mix some dektol or ansco 130 1:10
you will put the dektol or ansco 130 in ( after pre soak ) knock the bubbles off as usual, agitate 1 full min, and 10 seconds every min for 6 mins...
at 6 mins, pour it out and put the caffenol C in there, and continuously agitate for 4 mins. stop and fix &c
lastly take yoru 1:10 dektol or ansco 130 and develop your film in there for 10 mins 1 min 10 sec/min after that...
( 1:6 6 mins works well, as does 1:7 seven minutes )
my only real word of advice is before you develop film that means something and is important, shoot a roll or
2 and see how a new, suggested, never before used developer works in similar lighting conditions
and then do a few test rolls ..
as i mentioned
i process my film regularly in these developers ( for years, not just a roll or 2 )
my methods and work was recorded in the caffenol-cookbook.com and my website ( follow link in signature ) too, if you want to see
what some of the results look like ...
have fun + have a safe trip
john