QTR-Quadtone RIP

Thanks Paul.  This helps.

--- In QuadtoneRIP@yahoogroups.com, Paul Roark <roark.paul@...> wrote:
>
> David,
> 
> **
> >  I am trying to create QTR profiles for Eboni 6 for Epson Hot Press
> > Natural. I am using an Epson 1400.
> >
> 
> Be sure to download http://www.paulroark.com/BW-Info/1400-Eb6-Profiles.zip .
>  Although even with these profiles, I recommend learning to do your own.
> 
> 
> > I am following the QTR user guide (Document Version 1.1 21 April 2005).
> >
> > I am stuck on the second step where you need to determine the density
> > levels of each of the shades of black. My understanding is that I need to
> > determine what each shade's density limit is relative to black.
> >
> 
> It's relative to the black printed at its ink limit.  (Often, maybe
> usually, I find it best to have the dmax at a boost amount that is higher
> than the ink limit, but to start don't worry about this.)
> 
> 
> 
> > To do this, I look at the 100% shade of each ink
> >
> 
> No, what that other inks are at 100% is not relevant.  Look at their
> densities at their ink limits.  The ink limits of the midtones are flexible
> & subjective.  I use a double pair of reading glasses to inspect for
> smoothness.  As the load increases there will be a point where the images
> become blotchy.  The limit should be well below this point.  The shortcut
> is to set the ink limits at the same as the black ink.  Lighter inks have
> higher limits, so it's safe.  To hold the warmth down, I often run the Eb-Y
> limit up rather high, however, then taper the others off.  I always want a
> fair separation between the highest and next highest patches.  Don't go too
> far up the decreasing slope curve.  As I said, it's a bit subjective.
> 
> I have an abbreviated QTR tutorial starting at page 11 of
> http://www.paulroark.com/BW-Info/Eboni-4-Plus.pdf .  This is for a slightly
> different version of Eboni-6, but it's all basically the same.  I use
> Windows, so I'm not sure how much of this is relevant to Macs.
> 
> Good luck with the learning curve.  It's worth the effort.
> 
> Paul
> www.PaulRoark.com
> 
> 
> 
> >
> >
> 
> 
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