QTR-Quadtone RIP

I use the Q13 method Paul describes with my Epson 4990. This does 
work although it takes some fiddling to find the correct settings. 
Make sure you use black papper behind the Q13 and the test strips 
when you scan them, it does make a difference in the flare (contrast) 
of the image.

--- In QuadtoneRIP@yahoogroups.com, "Paul Roark" <paul.roark@...> 
wrote:
>
> >... The test strip looks good; I can certainly see the different 
> > shades at 4, 3, and 2. 
> 
> >So it has to be the scanner (Epson Perfection 3590.) I¹ll 
> > see if there anything that can be done with the controls. 
> 
> Using just the gray card to adjust the gamma of a scan was a 
simplification
> of using a Kodak Q13 card to do a more serious scanner 
calibration.  See
> pages 3-4 of http://www.paulroark.com/BW-Info/Making_B-W_ICCs-
1.pdf   I
> found that most scanners can produce reasonably linear grayscale 
scans if
> the gamma is corrected, but if yours can't it becomes much more 
work.  Your
> scanner may have also come with some system to calibrate it. 
> 
> Paul
> www.PaulRoark.com
>