martin_stuart

Acutance developers tend to destroy the tonality of an image, in my experience. For that reason, I've changed from Rodinal to ID-11 or HC-110. Acutance is also a function of the right combination of real film speed and devlopment time. For instance, your FP-4 might better be exposed at 8o ore even 60 iso and development time would be a function of the highlights in your image. If they are too dull, increase development time; if they are washed out, decrtease development time. The right combo will produce and enhanced acutance.