Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Loris Medici" 
<lorism@t...> wrote:
SNIP
> 2) Low CYAN usage [It seems that the Randall curves/Epson driver
> combination substites CYAN with BLACK and this makes a negative
> influence on hue/chromacity I think]
SNIP

Loris:  Yes, the black kicks in soon after the cyan position ink 
(dark gray) starts. This is driven by the reflective density on the 
paper of the cyan position ink and the Epson driver controlling the 
black ink.  

Hue/chromacity are color terms.  Grayscale shades (brightness, value, 
lightness) are what are important to B/W.  If the combined black/cyan 
inks yields the correct tone, then there is no problem. 

Differences in lightness/darkness of midtones between the RGB 
Partitioned Workflow and PiezoBW is completely a matter of taste.  
There is NO absolute correct way to divide the grayscale range 
printed on paper between the value of the paper and pure black ink.

Jeff Randall