QTR-Quadtone RIP

Eureka - That explains it, and that worked !

Now the step wedge shows continuous transition from light to dark. Just a little subsequent tweaking is necessary.  

Thank you Roy !

--- In QuadtoneRIP@yahoogroups.com, Roy Harrington <roy@...> wrote:
>
> 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]
>