An interesting discussion that likely relates to an issue I've seen in printing B&W photos. This from a qualitative POV... In using either B&W print modes (ABW or Canon) or icc profiles there is frequently a tendency to crunch deep shadow detail in varying amounts for images on a wide range of papers. Adding a simple hand built 'reverse' tone curve in PS can often even things out, but it would be nice to find a profiling solution that could (if desired) help deliver a more linear looking print from darkest to lightest for a particular paper/inkset. Why bother? I feel it could give a more consistent starting point for editing and printing B&W photos. It's also a question I get asked quite often (indirectly) by photographers trying to print their B&W photography. X-Rite recently added B&W icc options to i1Profiler when they produced the i1Studio version of the software for the ColorMunki. I had hoped that these profiles might show some attention to the non linearity issues I see, but they do not. Bye for now Keith Cooper Northlight Images