QTR-Quadtone RIP

> Part B): Editing and printing
> 1) Open in PS CS2 a tiff immaged scanned with a Nikon 5000ED
> 2) Assign the profile gray-lab

This scanned TIFF, does it have a profile when you open it? If so why are
you "assigning" the gray-lab profile? Try converting instead. Assign should
really only be used when you have an untagged file and you know what profile
it should actually have associated with it.

> 3) Edit at will
> 4) When editing is complete, duplicate the image
> 5) Switch on softproofing for one of the two images, by using 
> the ICC profile obtained in part A). In the softproof setup, 
> use perceptual, BPC, Simulate paper color and simulate black 
> ink ( I have tried other combination of the switch, but this 
> seems to work the best)

I've found the Simulate paper white/black ink to be very poor predictions of
what the print will actually look like, I leave these diabled.

> 6) Add a layer curve to the sofproofed image and adjust until 
> it matches the non-softproofed image
> 7) Save the file (no further profile conversions)
> 8) Open the file in QTRgui
> 9) Print
> 
> The workflow looks straitghforwad. However, the print never 
> matches the screen. The only thing that puzzles me a bit in 
> my workflow is that I use an untagged file (21-step.tiff) in 
> the print for the ICC profile generation while I use a tagged 
> file (with gray-lab assigned) in the final print. Where the 
> softproofing get the information that my working space is a gray-lab?

How is the print different from the screen? Is there any consistency to
this? 

Jeff