Digital BW, The Print

If you are doing some custom workflows and ink segmentation, you may 
wish to print this 256 level grey scale as an ultimate test to the 
quality of your results. A 21 step, even a 100 step curve will not 
show flaws that Will be observed in your photographs.

http://www.engr.udayton.
edu/faculty/jloomis/ece563/notes/color/GrayScale/grays.html


Best,
Alex
Orlando