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QTR-Quadtone RIP

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Message

Re: Still trying but what's wrong?

2010-09-14 by Keith

I have this printed out and have read it but....
First, this is Mac centric. I'm on a PC.
Second, he used ProfileMaker Pro using an EyeOne(?). I have the Spyder3Print spectro.
Third, he talks of going into PS when you hit the print button. When I open QTR>Tools>Options>Calibration Mode, the Ink Pattern Page is shown. When I hit print, it prints the page and I'm assuming that since it is printing without PS running, it is not color managed.
Since I printed through QTR(no PS involved) I printed out the pages as I previously outlined, so it answered my own question about whether a 3rd one was needed. 
Following into step 9 and doing the math, I multiplied the LK(25%) by the LLK(31%) which gave me .0775 for the LLK number. Does this sound low?
In his second step 9 he says to use a text editor to open up the appropriate raw curve. This is where it looses me becuase it says that there are 4 raw curves from which to pick. Going into Program Files>QuadToneRip>Profiles>4800> I see three types of files. .amp, .raw, and .qidf. I see cool, coolse, sepia, warm. 
 

--- In QuadtoneRIP@yahoogroups.com, Michael King <drmrking@...> wrote:
>
> Keith,
> 
> go off and read this and then if you have further questions come back and
> ask...
> 
> http://www.diallophotography.com/pdfs/QTRworkflow.pdf
> 
> <http://www.diallophotography.com/pdfs/QTRworkflow.pdf>Mike
> 
> On 14 September 2010 21:49, Keith <kjrslr@...> wrote:
> 
> >
> >
> > Thanks Mike. You are being VERY helpful.
> > Still have questions.
> > First.
> > For the intial Calibration page I printed, I determined that max ink to be
> > 73%. What should I have been looking for from my measurements(w/Spyder3Print
> > spectro) Lab or density? In other words, which should I use and what change
> > should I see, number wise? I think I used the numbers I got from density
> > readout.
> >
> > Next, Since I determined 73 was the point, I put that into the slider and
> > printed out a new Calibration page to get the limit for the LK which I
> > determined was 25% of Blk.
> > So the Calibration page(set at 73)was printed out I read the 100% patch for
> > LK. The reading I got for Density was .88 and L was 42.96.
> > I then measured Blk and found the 25% patch read Density at .88 and L was
> > 42.81.
> > Should I have printed out a 3rd Calbration page with the slider set to 25
> > to detrmine the LLK as I did to get the LK?
> > The reason I ask is that the existing curve I used had the LK at 22.8 and
> > LLK at 7.6 where as what I measured I got for LK was 25% but LLK was 31%,
> > but I only printed out just the 2 calibration pages(the 1st and then 73%).
> > Because the 31% seemed too high(compared the existing curve) I wondered if I
> > should have printed a 3rd page for determining the % of LLK from LK. Do you
> > follow my question?
> >
> > To answer your question as to which strip, I'm refering to the one printed
> > out(following the instuctions you mention)after I put in the numbers from
> > the Calibration page(which determine ink limits).
> >
> > You're answering a lot Mike, please keep it up!
> >
> > --- In QuadtoneRIP@yahoogroups.com <QuadtoneRIP%40yahoogroups.com>,
> > Michael King <drmrking@> wrote:
> > >
> > > Hi Keith,
> > >
> > > >>So correct me if I'm wrong. Are you saying that when I called up the
> > > existing curve to modify, I should have removed the >>linearization
> > first,
> > >
> > > Yes
> > >
> > > >>THEN added the numbers I got from the ink calibration into the Curve
> > > Creator box, AND THEN print that(the >>21 step wedge)out?
> > >
> > > Yes
> > >
> > > >>Do I then measure this new strip and put those numbers in the
> > > linearization boxes?
> > >
> > > Yes
> > >
> > > >>If the strip doesn't >>look good, what do I modify next?
> > >
> > > Which strip?
> > >
> > > So after the above, you effectively have a print path that prints linear
> > L
> > > vs RGB value.
> > > Now the question is how are you going to map what you see on your monitor
> > to
> > > this print path?
> > > Since you have a spectro and the final linerized target already printed,
> > I
> > > would suggest that you create an QTR RGB ICC profile and use that to soft
> > > proof your images in photoshop - with preserve values checked. This gives
> > > luminance and "colour" soft proof.
> > >
> > > Also you can use one of the ICCs in QuadToneRIP/icc to soft proof. This
> > will
> > > give you approx luminance.
> > >
> > > Mike
> >
> >  
> >
> 
> 
> [Non-text portions of this message have been removed]
>

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