Ilford FP4 Plus.

smithy17 said:

Is ID-11 a good choice for FP4 Plus (120 medium-format), or would Perceptol work better?
I use diluted Perceptol for developing Pan F Plus to help control the contrast, but I think FP4 Plus probably has less inherent contrast.
Any regular FP4 users here?

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I do hope so, as I use FP4 all the time and recently ran out of D76 and had to buy ID-11 as the only developer locally available. However, I believe the formulation is virtually identical.

ID-11 and D76 are basically the same. I didn't find Perceptol terribly different in effect either, though it seems to have a bit more silver solvent effect to it and naturally lead to slightly slower film speed. Any of these work well with FP4, which I never rate at box speed anyway. Want a bit more in the shadows. And I've long since moved over to pyro developers.