QTR-Quadtone RIP

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" <kenlee333@> 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]