QTR-Quadtone RIP

Roy,

Thanks, that's also relevant info for me. Frankly, while really 
appreciating the curve creation and print driver site of QTR I have 
never come to grips with wrt the softproofing side. One of the key 
things that's puzzling me is why it apparently optional for icc 
profiles to support the functions "simulate paper color" 
and "simulate black ink" (I'm using Photoshop CS3 on Windows Vista) 
The icc profiles provided with QTR (gray-lab, gray-matte etc.) DO 
support "simulate black ink", but not "simulate paper color". Other 
profiles that do support "simulate paper color" tend to darken the 
image (substantiall), which I find logical as light reflected on 
paper is of a lower luminosity then white emitted from a monitor. And 
that is what still bothers me most in getting a better monitor-print 
match (QTR curves are fine, monitor is calibrated).

Can you shed some light on this? Is my expectation/wish correct or am 
I missing the point? What is the reason that the QTR icc profiles do 
not support this option?

Thanks,

Joost





--- In QuadtoneRIP@yahoogroups.com, "Roy Harrington" <roy@...> wrote:
>
> Hi Peter,
> 
> There are 3 create icc programs because some editing programs have
> restrictions and anomolies.
> 
> QTR-Create-ICC makes a grayscale ICC for printing and softproofing.
> Photoshop handles these and works great.
> 
> QTR-Create-ICC-RGB makes a functionally identical ICC but it's in 
RGB format.
> Programs such as Lightroom, Qimage, and I think others don't work in
> grayscale so you need an RGB format ICC file.
> 
> QTR-Create-ICC-RGB-bpc is similar to the above but maps black-to-
black
> directly.  This takes away softproofing with simulate-ink-black 
capability.
> But some programs seem to get the "Black Point Compensation" wrong 
with
> the above ICC profiles so this ensures that everything is correct.
> 
> It's unfortunate that there seems to be variation of how different 
programs
> handle B&W issue but that is the current state of things -- so 
different ICCs
> are needed for them.
> 
> Roy
> 
>