Printing on variable contrast papers, overall, I'd give the nod to PMK. PMK grain appears finer and tighter. Acutance is pretty much equal. DiXactol does very nicely in the mid values, and I would say *slightly* improves upon PMK, but both are better than anything else I've tried. PMK is far better with high values. Both get very tempermental with underexposure--grainy and harsh.(posted 8479 days ago)I print with an Aristo coldlight head, with variable contrast control, so can't speak for the results you might get using a different light source and filter contrast control. One thing for sure, PMK is a lot cheaper. Also, it's here to stay. DiXactol is produced by a very small company and could disappear tomorrow. With any proprietary formula, you never know if it will vary or disappear altogether.