QTR-Quadtone RIP

jkohn_home wrote:

> I haven't determined exactly what's going on here and whether it just
> affects printing to file, or just happens with grayscale files.  But
> right now, I do not recommend QTR users to use QImage for
> layout/interpolation if you care about getting accurate tonality in your
> prints.

So not much has changed in 20 months then. I have not used 
Qimage's CM for QTR's B&W since I discovered the same 
problems. Could be the BPC in Qimage's CM though that gives 
the problems. BTW, I do not have any problems with color CM 
using Qimage, behaves almost exactly like Photoshop.

You will find several messages in the 
DigitalBlackandWhiteThePrint@yahoogroups.com list (first 
months of 2005 mainly) that were the start for the ICC 
linearising and profiling for QTR (+Qimage) and the way it was 
created at that time + some tests how it performed. Both the 
QTR profiling and Qimage's CM have changed since but I still 
use the PS P2P conversion to the QTR printer profile and 
Qimage-CM-off method like you suggest here.

BTW using QTR's profiles in Picture Window Pro is even worse.

Ernst

-- 

                    --
           Ernst Dinkla


www.pigment-print.com
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