A couple of months ago I decided to make the switch to FP4 in Pyrocat HD. Prior to leaving for the summer I did a quick test shot in the back yard. I did 2+2+196 in an inversion tube, (a little like the BTZS tubes but more like a taco in a tube), minimal agitation, first minute continuous gentle inversions, then 5 seconds every three minutes, for 15 minutes, 70 degrees. The test shot was perfect, seemed a little too simple.
Fast forward to now. I shoot a 4 stop waterfall scene. Ambient was f22 @ 30th sec. Shadows f11, and the water f45. I shoot the shot at f22 @ 30th at 100 iso. 100 was just a guess as well. Develop the same as at home. The negative comes out extremely thin. Almost no density in the shadows, and even the water is thin, but printable.
Obviously I need more exposure or more development.
But the question for you Pyro guys, am I way off with my 15 minutes? I was unable to find much data relating to tank inversion developing. 15 minutes was just a guess for a starting point.
I have not done film speed tests.
Thanks for your time.
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