Digital BW, The Print

I just measured the density differences between the 1440 and 2880 resolution
settings on the 1280 when printing MIS VM inks.  The 2880 setting usually
prints slightly darker.  With a PC, using sRGB, and the Photo Paper setting
to allow 2880, the following density differences appear (units out of 256
measured with the eyedropper):

		Warm curve				Neutral curve

	90% - 1 unit darker,			1 unit darker,
	70% - 2 units darker,			1 unit darker,
	50% - 2 units darker,			1 unit darker,
	30% - 1 unit darker,			2 units darker,
	10% - 1 unit darker,			<1 unit lighter.

These differences are slightly more than I would expect from random
variations between print jobs -- though not by much.

There is a slight difference in the ramps also.  I am uncertain whether
anyone would ever see the differences in quality (smoothness, etc.) between
1440 and 2880. So I'm inclined to think that 1440 would be the best target
resolution for writing curves.  However, the current 1280 PC curves were
written for 2880.  So, for than machine both will be out there.  I'll have
to come up with some designation to distinguish them.


Paul
http://www.PaulRoark.com