Some interesting info here: http://members.home.net/hmpi/(posted 8710 days ago)Why Kodak touts T-Max developer as the primary process recomendation for TMX is a mystery. Note too that PPR is for 75 degrees (I think) and the results at 68 degrees may not be as good. The stuff is an energetic developer best suited for pushing films. It never impressed me as a general purpose pictorial developer. I got pretty good ultra- fine grain results with XTOL, but found the Dmax was a bit low, limiting the exposure latitude. The curve may be a bit peculiar, but I never got around to plotting it. Tonally, I got the best results with TMX in Rodinal, but the grain was excessive. The Rodinal was also the only developer I found that gave visually sharp results. TMX isn't known for high visual sharpness. Ultimately I stopped wasting my time with TMX and switched to FP4+ and XTOL 1:3, with which I've been extremely pleased. I did have much better success with TMY- easier to control, good tonal quality, nearly grainless and not so sensitive to processing.