QTR-Quadtone RIP

Hi everybody,

I have built some curves for the EEM yesterday (based on the curves 
supplied by Roy) and noticed that the original R800 curves do not use 
Photoblack. However in the printed Testchart photoblack is clearly 
lighter that Matte black so that I just tried to use photblack as a 
Lightblack. The results seem to be quite good. With the new 
linearized curve (including photoblack) I do not have anymore banding 
problems and the print is smooth and not as dotty as when using the 
original curve. I seem to get much smoother transitions than before. 
Tonewise I had to add a little more Magenta to neutralize a greenish 
tone which Photoblack seems to have.

However the last tests have done resulted in a slightly contrasty and 
light (otherwise good) print. Can I change the shadows / highlights 
or Gamma for the black ink after having linearized or will I have to 
linearize all over again after having changed shadows and highlight?

If anyone is interested I could upload my cold and warm curve.

Regards,

Ignacio