QTR-Quadtone RIP

On 15 September 2010 17:04, Keith <kjrslr@...> wrote:

>
>
> Once again Mike, thank you for your patience!
> With the info that you you provided, I went back and remeasured the Cal
> page and determined that a new value was needed and printed out a new 2nd
> page and measured that. Much quicker this time around!
> But going back to the profile folder, I realised that the curves I was
> using(as a basis for modifing)are for matte papers using MK inks. I'm using
> PK on photo type papers(Innova Fiba Print Semi Matte). So my question once
> again is about the profiles. Other than the .qidf files(which are all listed
> for matte(MK) papers the other files are .amp and .raw. Do you know what
> those are for?
>
No idea what they are for.

Yes they aren't any PK profiles for 4800 by the looks of it.

So you either;
a) ask if anyone else has one you can start from..
b) take one from another printer as a starting point but you need the same
ink channel mapping
c) start with MK one and change MK for PK curve.

I honestly don't know much more about this as I'm a B&W inkset MK only
printer.
Haven't studied what's need to create colour curves.

Good luck,

Mike

> Again from the workflow you provided:
> "Two sets are provided; one for matte papers and one for glossy media. Each
> set contains four tints: cool, neutral, warm
> and sepia. Begin with the neutral curve. Later you will create a separate
> custom curve for each remaining tint.
> *If your printer model contains no raw curves, choose a neutral curve for
> an existing paper that is similar in characteristics
> to the paper you wish to calibrate, taking care that the appropriate ink
> type (pk or mk) is chosen."
>
> I do not see two types, only matte. I'm assuming that(in the folder)coolse
> is the neutral curve. All of the curves listed with TC-***.amp(or.raw) are
> listed twice, one with PS(in the icon) and one without.
> All I'm trying to figure out which curve I should start with to modify.
>
> --- In QuadtoneRIP@yahoogroups.com <QuadtoneRIP%40yahoogroups.com>,
> Michael King <drmrking@...> wrote:
> >
> > > 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.
> > >
> > .qidf. = cool, coolse, sepia, warm. are the 4 curves. But you can use the
> > windows GUI that you have been using rather than editing the text file
> > directly. If you want to view the qidf file use wordpad. To do this put a
> > short cut to wordpad on your desktop and drop the qidf file on it....
> >
> > Mike
> >
> > >
> > >
> > > --- In QuadtoneRIP@yahoogroups.com <QuadtoneRIP%40yahoogroups.com><QuadtoneRIP%
> 40yahoogroups.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><QuadtoneRIP%
> 40yahoogroups.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]
> > > >
> > >
> > >
> > >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>  
>


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