QTR-Quadtone RIP

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.

Have I overlooked something ?

Many thanks as always.

See http://www.kenleegallery.com/images/carbon/Platine.png
<http://www.kenleegallery.com/images/carbon/platine.jpg>   and
http://www.kenleegallery.com/images/carbon/PlatineCalibration.jpg
<http://www.kenleegallery.com/images/carbon/PlatineCalibration.jpg>  
and http://www.kenleegallery.com/images/carbon/img019.jpg

  <http://www.kenleegallery.com/images/carbon/img019.jpg>



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