Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark" 
<paul.roark@...> wrote:
>
> 
> 
> >... Still not sure how the driver knows to turn on the black ...
> 
> The driver looks at the RGB values and starts to substitute black 
as the 3
> curves approach the black point.  Take a look at some of the UT-3D 
curves
> for glossy paper and you'll see where I have to turn the blue curve 
upward
> to stop the Eboni from being injected.  In UT2 curves, when the red 
and
> green curves are very close to black, the blue curve (sepia ink) 
becomes, in
> effect, the black ink curve.
> 
> Paul
> www.PaulRoark.com
>


Paul,

Thanks very much for explaining this,I've looked at the curves and I 
see what you mean. And I guess this answers my question about what 
makes the black ink come in with Eboni on glossy paper too - nothing. 
The idea that you could get black without the black ink is somewhat 
counter-intuitive to me!

Best regards,
Ben