Quite right. This very high highlight contrast is a rather unique characteristic of Acros (along with reciprocity) in comparison to its TMX and Delta 100 comparables. Contrast actually increases around zone IX and remains at that maximum until around zone XIII with a fairly abrupt shoulder thereafter. TMX and Delta (as well as TMY, FP4 etc etc) exhibit more gradual shouldering and develop to significantly lower densities in extreme highlights (above zone X).
Originally Posted by Leigh B