QTR-Quadtone RIP

I'm just starting to play with QTR, hoping to use it with the new UT-FS and
UT-FSN inks from MIS for the 2000P. These are fixed tone quadtones, but the
printer is a six color printer, so the two middle tones are duplicated in
two chambers of the cart. (That is, there's one black, two dark grays, two
mid grays, and one light gray.)

From the QTR documentation, I can't figure out how to set the ink limits so
that it uses equal ink from both chambers. Do I set the ink limits on both
to be half of what it would be if I only used one or the other? Or do I
leave it unchanged? Or is this possible at all?

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...

> From the QTR documentation, I can't figure out how to set the ink limits so
> that it uses equal ink from both chambers. Do I set the ink limits on both
> to be half of what it would be if I only used one or the other? Or do I
> leave it unchanged? Or is this possible at all?

Let's say C and LC has the same inks. If C is part of a partitioned 
curve you can set LC to 'Copy curve from C' with an ink limit of 100. 
C's ink limit should be half of what you'd normally use.

The reason LC should have an ink limit of 100 is that it copies the 
curve from C after C has already applied its own ink limit. Applying 
another ink limit would reduce the copied curve further.

--
Daniel Staver
http://daniel.staver.no

> From: Daniel Staver
>
> Let's say C and LC has the same inks. If C is part of a partitioned
> curve you can set LC to 'Copy curve from C' with an ink limit of 100.
> C's ink limit should be half of what you'd normally use.
>
> The reason LC should have an ink limit of 100 is that it copies the
> curve from C after C has already applied its own ink limit. Applying
> another ink limit would reduce the copied curve further.

Thanks. I never would have guessed that, nor would I have been able to tell
what it was doing by looking at the results.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...

--- In QuadtoneRIP@yahoogroups.com, "Paul D. DeRocco" <pderocco@i...> wrote:
> > From: Daniel Staver
> >
> > Let's say C and LC has the same inks. If C is part of a partitioned
> > curve you can set LC to 'Copy curve from C' with an ink limit of 100.
> > C's ink limit should be half of what you'd normally use.
> >
> > The reason LC should have an ink limit of 100 is that it copies the
> > curve from C after C has already applied its own ink limit. Applying
> > another ink limit would reduce the copied curve further.
> 
> Thanks. I never would have guessed that, nor would I have been able to tell
> what it was doing by looking at the results.
> 
> --
> 
> Ciao,               Paul D. DeRocco
> Paul                mailto:pderocco@i...

The other thing you can do, Paul, is to just put both in the list of grays with
just slightly different values, like C=37 and LC=36.  The partitioning will
just switch over from one to the other.

Roy