Digital BW, The Print

Thanks John and Bill for the excellent posts. By the way, it's very
difficult to create a real 16 bit grad test file in PS. Using the grad
tool, with dither, in 16 bit provided only 8189 unique levels, without
dither it was half that. Far fewer the the 65535 possible in a true
single chammel hi bit file. Of course PS is not true 16 bit, but
should provide much more.
There may be good source files out there somewhere for testing. But
I've gotten far more levels from hi bit scans of images, of course
they are much more complex then a grad.
How to determine unique levels? A cool little app (Mac, OS9 only) on
Bruce Linbloom's amazing site-
http://www.brucelindbloom.com/
Tyler