QTR-Quadtone RIP

--- In QuadtoneRIP@yahoogroups.com, "Tom Moore" <r.t.moore@...> wrote:
 
> There are two ways you can go about doing what you want. You can 
> adjust the 1440 curve. To do that I would start by reducing all the 
> limits by 85% and then further adjusting the black boost for highest
> dmax without bleeding.
> Then you would have to re-linearize. It's true that the Cone 
> supplied curves are different from those that can be produced by 
> QTR. At least with QTR derived curves you have the ability to make 
> changes to correct problems like the one you're encountering. 

Why would one want to decrease all of the ink limits?  Are you talking
about setting the default ink limit to 85% of what it was (which was
75%), or 64%)?  So far I have had some success by just decreasing the
black boost to fix the overinking in the shadows.

> Another approach would be to use the existing 2880 curve and 
> reducing the QTR Ink Limit Adjustment (in the print window) until 
> the bleeding is eliminated. Assuming the resulting dmax is still 
> acceptable, you could then re-linearize for that ink limit by 
> creating an ICC file using QTR_Create_ICC.

This sounds like a better solution, since it would fix the problem
(hopefully) while still preserving the rest of the Cone profile and
the careful toning.  Does this just affect the black ink?  Are the
numbers the amount to decrease the ink limit for that black ink?

Thanks.

--John