QTR-Quadtone RIP

The 40 is your default ink limit above on the page.  This is setting all
inks at limit=40 unless you
override it.  So I'm overriding it setting it to 20 for the two inks that
are doubled up.
Personally I'd but all the limits on each line so its more obvious what you
are doing.

You'll also need to do the same thing with your other doubled ink.  I.e. LM
-> density 23, limit 20
and LLK -> copy LM, limit 20.

Roy



On Sun, Jun 30, 2013 at 6:37 AM, kenleegallery <kenlee333@...> wrote:

> Thanks Roy -
>
> Is this what you are suggesting for the Magenta and Light Black channels
> ?
>
> (I kept 50 as the Density setting for Magenta, and entered in your
> recommended Limit of 20, and then specified that Light Black should be
> derived from Magenta, with a limit of 20. )
>
> See http://www.kenleegallery.com/images/carbon/RoySuggestion.png
> <http://www.kenleegallery.com/images/carbon/RoySuggestion.png>
>
> If so, where does the number 40 come from ? Don't you mean 50 ?
> Shouldn't the limit be 50 / 2, or 25 ?
>
> Many thanks !
>
> - Ken
>
>
> --- In QuadtoneRIP@yahoogroups.com, Roy Harrington  wrote:
> >
> > Ken,
> >
> > I think you are doing the doubling up of inks incorrectly.
> >
> > For instance you have:
> > Magenta is 50% of black -- LK is the same ink.  You don't want to
> halve the
> > "density" value, you
> > want to have the 50% density value but take half the ink from M and
> half
> > from LK.
> > So you make M=density 50 but ink limit 20 = 40/2,  then make LK just a
> copy
> > curve from M not one
> > of the gray inks.
> >
> > You might find it easier to try without the doubling first.
> > Get that right and then do the split usage of two jets.
> >
> > Roy
> >
> >
> >
> > On Sat, Jun 29, 2013 at 5:23 AM, kenleegallery kenlee333@... wrote:
> >
> > > If you look at
> > > http://www.kenleegallery.com/images/carbon/PlatineCalibration.jpg
> you
> > > will see the readings for the most dense patch of each ink are at
> the right
> > > of each ink.
> > >
> > > Depending on the size of your display, your browser may have reduced
> the
> > > size of the image. If you view it at 100% you should be able to read
> the
> > > image.
> > >
> > > Note that Magenta and Light Black use the same ink, so their values
> are
> > > divided by 2 in actual use. Similarly, Light Magenta and Light Light
> Black
> > > are handled the same way.
> > >
> > > Cyan: 1.64 which matches 78% of Black
> > > Magenta: 1.22 which matches 50% of Black (divided by 2 because of
> Light
> > > Black)
> > > Yellow: 0.28 which matches 10% of Black
> > > Light Cyan: 0.77 matches is 31% of Black
> > > Light Magenta: 0.61 which matches 23% of Black (divided by 2 because
> of
> > > Light Light Black)
> > >
> > > Light Black: same as Magenta
> > > Light Light Black: same as Light Magenta
> > >
> > >
> > >
> > >
> > > --- In QuadtoneRIP@yahoogroups.com, "ccolbertbw" ccolbert@ wrote:
> > > >
> > > > Ken,
> > > >   1) Be sure you make the calibration sheet with calibration mode
> chosen
> > > in the print driver.
> > > >   2) Make sure you print the step wedge normally (i.e., without
> > > calibration mode).
> > > >
> > > > I can't make out all your measurements.  What is the reading for
> the
> > > most dense patch for each ink?
> > > >
> > > > --- In QuadtoneRIP@yahoogroups.com, "kenleegallery"  wrote:
> > > > >
> > > > > I  measured the QTR calibration page with a spectrophotometer
> and made
> > > a
> > > > > second calibration print with adjusted ink density.
> > > > >
> > > > > Then I determined the relative densities and created a curve.
> Then I
> > > > > printed out a 21-step wedge.
> > > > >
> > > > > The wedge gets darker in the middle, then gets lighter, then
> gets
> > > darker
> > > > > again.
> > > > >
> > > >
> > >
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> >
> >
> > --
> > Roy Harrington
> > roy@...
> > www.harrington.com
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>


-- 
Roy Harrington
roy@...
www.harrington.com


[Non-text portions of this message have been removed]