Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark"
<paul.roark@v...> wrote:
>
> Philip,
> 
> > ... I was looking at QTR 2200 profiles for UT7 inkset. 
> >I found majority profiles are using 3 or 4 inks only ...
> 
> I have not looked at the QTR curves.

You're lucky. I have.

> For some situations the light toner
> might be able to give enough toning for a decent image, at least on
a matte
> paper.  However, for best quality for neutral tones and especially for
> glossy paper, I'd use all the C and M channel inks.  In my view the
LK and Y
> would be the only unused spots for most situations.

Quite true.
 
> However, you're best shot in a quad might be to use the UT7 C and LC
> (carbons) and the Ut7 LM as the sole toner.  In a modern quad like
the C86,
> that might work.
> 
>  
> >   Is it possible, using Epson drivers we need more than 3 or 4
inks, but
> > use QTR we need only 3 or 4 for each paper?
> 
> QTR can be more efficient in this respect than the Epson driver. 
The LK,
> for example, is really a wasted spot for B&W with the Epson driver.
> However, I suspect, especially for glossy papers, at least 4 gray
inks are
> needed for best quality in neutral prints.  The light toner only will
> probably not be able to stop a visible cross-over in the shadows,
and it may
> flood the glossy papers there also.

Light C and light M can stop the crossover, right down to the shadows,
but no existing QTR curves are written that way.

This will not "flood" most papers, the liquid limit is way higher than
the pigment limit. You can dump almost twice as much "wet stuff" on
the paper before you run risk of smear or warp as you can before you
overload the pigment and start losing DMAX.

But this will "flood" the algorithm in the antiquated GIMP print
engine in QTR. You'll get "white worms" from the lighter colors.