QTR-Quadtone RIP

Thanks for that Paul.

Now let's see if I am understanding you and Tom as I can understand it.

Let's say I'm going to make a neutral curve with QTR for Epson Premium Semi Gloss, with UT2 inks for the Epson 1290 printer and like the "supplied" curve for Epson Premium Lustre I don't use Black ink. I will use the existing profile for the Lustre paper as a template.

(I will also try your other suggestions)

So, after printing out the test page "With a loupe or a densitometer I look for a patch where it appears that all the paper is covered with ink".

Presumably in this case I am only interested in M, LM, C and LC.

"Now we must measure the density of each ink in terms of the next darker ink".

"You are also deciding the order of the grays to be used during this process".

I interpret this as M  in terms of C 
                    LC in terms of M
                    LM in terms of LC

Lines in quotes are from Tom Moore's User Guide.

The further point I would appreciate an answer to is:-

Am I correct in using the X-Rite 810 Visual channel setting for evaluation of these "coloured" inks ?


--- In QuadtoneRIP@yahoogroups.com, Paul Roark <roark.paul@...> wrote:
>
> Hi Mel,
> 
> **
> >  I am about to create QTR curves for the Epson 1290 using MIS UT2 inks for
> > a variety of papers.
> >
> >
> > I am starting with Epson Premium Semi Gloss and Epson Glossy Photo Paper,
> > ...
> >
> > I have printed off the Ink Separation Test Page for each paper, no problem.
> >
> > ...
> >
> >  when using Epson Premier Lustre paper with UT2 ink and neutral tone, Black
> > is not used, just C, M, LC, and LM and with Epson Enhanced Matte all
> > "colours" except Yellow are used.
> >
> See http://www.paulroark.com/BW-Info/UT2-Readme.htm for a description of the
> UT2 inks.  The default setup has Eboni matte black in the K position.  It is
> not compatible with glossy paper.  (It'll rub off.)  As such, it is not used
> for glossy or luster papers.  You can install a PK in the K position and use
> it with glossy papers, or you can just generate the 100% black from the C
> and M inks.
> 
> If PK is not installed and you use, for example, M to generate the 100%
> black, compare the LM to the M printed at it's ink limit.
> 
> You might want to make 2 profiles -- LM&M in one, and LC and C in the other.
>  Then you can mix them with the sliders to control tone.
> 
> While the M or C might result in a good dmax, keep an eye out for pizza
> wheel marks.  Using the PK might reduce these, as it'll have less dampness
> per unit of carbon, hopefully drying enough by the time it hits the rollers
> to avoid the marks.  The exit rollers might also be removed from the
> printer.
> 
> Note that you can also use QTR's Create ICC-RGB to make ICCs from the
> existing Photoshop curves.  See
> http://www.paulroark.com/BW-Info/Embedding_Photoshop_Curves_in_ICCs.pdf
> 
> Hope this helps.
> 
> Paul
> www.PaulRoark.com
> 
> >
> >
> 
> 
> [Non-text portions of this message have been removed]
>