QTR-Quadtone RIP

--- In QuadtoneRIP@yahoogroups.com, Roy Harrington <roy@...> wrote:

> I'm not sure which "workflow by Duane" you're referring to.

I meant the one he is describing earlier in this thread, but to avoid 
furhter confusion I'll summarize it as I understand it.

1) make sure your monitor is well profiled
2) make sure you have well calibrated QTR curves for your printer-ink-
paper combination (following Tom Moore's user guide)
3) edit the image in whatever colorspace you like
4) softproof the image with the icc profile for the printer-ink-paper 
combination created with QTR-create ICC (or if not available, with 
either the gray-matte-paper or gray-photo-paper icc profile)
5) if applicable, flatten the image, convert to 8-bit grayscale
6) "convert profile" the image to Gray-LAB
7) save the file in TIF format
8) print the file using QTRGui 

This definitely IS different as the workflow you describe. The use of 
the gray-matte-paper and gray-glossy-paper profiles is totally 
different. 

To me it absolutely doesn't make sense to calibrate the system in one 
color space (gray lab) and then suddenly print in another (gray-matte 
or gray-photo). In this comment it is assumed that the step wedge for 
calibration is NOT to be converted to gray-matte or gray photo, but 
left as it is, which is gray-lab. If you could just explain the 
rationale behind this, that would help a lot....

My head is spinning now to understand whether in effect the two 
workflows are actually equivalent, where in yours you compensate for 
the print-monitor differences by converting the file and in the one 
described above in the softproof...?? I'm currently travelling so I 
can't try, but it would be an interesting experiment....

Joost