Old films love old developer
Old films love old developer
iI use Foma's RO9 with Efke films, also Plus-X, but mainly with the "old school" stuff like Efke. At 1+40 it's great with KB25. I use the Massive Dev Chart's times & it works great. For the "modern" films, especially the flat-crystal ones, I use modern "Rodinal". PanF+ is good, too.