theHUN wrote:
Roll 170: Characterizing the FP4 curve with Rodinal (1+75 [12 + 900 mL], 12 min, 20 C) in a Simma Sine Wave agitator. I had assumed ISO50, which should have given me a density of 0.1 4 stops below a normal exposure, and that is exactly what I got. Note how linear the curve is even at Zone 11, which is quite different from the FP4 spec sheet. This is one of the reasons it pays to do these.
Once I finish the curve for HP5 I should be back to taking normal shots.
I admire your rigorous testing. I'm happy to leave developing to my local lab for now, but if I ever do get around to doing it myself, I will probably do the same.