I shoot a lot of HP5. At 650, I use Microphen 1+3 and long developement time to tame the contrast. At 400, I use ID-11 at 1:1 for noce mid tones.
Pulling HP5 to 320 using the HC-110/Rodinal cocktail seems to be something interesting to explore and add to my pallet. Thanks for the thread.
Perceptol at 200-250 is also interesting. What are the times and dilutions for each speed? Thanks in advance.
Cal