QTR-Quadtone RIP

Hi all!

Nobody can help me with my questions below?

Any help welcome!!!

CU

Peter

--- In QuadtoneRIP@yahoogroups.com, "grayscale2008" <pm2003@...> wrote:
>
> Hi all!
> 
> Still "fighting" with creating curves for Hahnemühle Photo Rag...
> 
> My equipment:
> 
> PC, Windows XP SP3, CS3, EPSON 2100 + original UltraChrome inks, QTR
> 2.6.1.0.
> 
> Here are my questions:
> 
> 1.) If I gonna change some of the original curves (qidf-file) what
> will happen to the quad-file? How will the change be "transmitted"
> (See reason question 2)?
> 
> 2.) I wanted to add a Photoshop curve to the toner curve. But I got
> the following error message:
> 
> "did not return valid coordinates at quadprofile.pl line 39"
> 
> What is wrong?
> 
> 3.) Some curves got linearization data going down from app. 98 to app.
> 18, others go up from app. 0,02 to app. 1,7.
> 
> Why that?
> 
> 4.) The L-Curve in the *out-text file does not make a complete even.
> The last 3 values in the steps 90, 95 and 100 are 20,62, 18,77 and
17,53.
> 
> Can somebody please explain that?
> 
> 5.) I had a look at the UC-EEnhMatte-warm-curves of one older version
> of QTR (2.5.2.0) and I found that text in the qidf-files:
> 
> # the following is a special UltraChrome ink flag it copies the
> # light-black curves to the light-cyan, light-magenta and yellow inks.
> # this insures that the LC and LM inks are used to directly neutralize
> # the color of the light-black.
> # the color balance of inks is controlled by the LIMIT_ values above.
> #
> UC_NEUTRALIZER=YES 
> 
> What is the reason for that and why is it not longer in the actual
> version of the curves?
> 
> Sorry for all this questions...
> 
> CU
> 
> Peter
>