QTR-Quadtone RIP

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@...m, "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.
> >
>