QTR-Quadtone RIP

The least error prone way of doing this from photoshop is to use the calibration image and 
the calibration mode for printing.

What I usually do is just make a large rectangle of the color(s) I want to purge.  Use the 
color sampler to pick the color off the calibration target,  then do a fill of the rectangle 
with  that color. Often you want the color from the 80%  density.  On cheap paper you 
might need less ink,  say 50%.  Finally print using the calibration setting in the QTR driver 
panel.

The only thing to be careful about is to be sure that the color space of  the file you create 
exactly matches that of the calibration image. You don't want any color conversions when 
you fill with the calibration color.

I've had good luck with this method. Hope it helps.

ccolbertbw

--- In QuadtoneRIP@...m, "momoinu_dc" <LotusM50@...> wrote:
>
> I was wondering if you could use QTR to create a profile that would
> only use one ink (black, yellow, magenta, whatever).
> 
> I am not necessarily thinking along the lines of "black-only" printing
> (although "magenta-only" might be interesting), but rather as a way to
> purge a particular ink without having to purge all inks.
> 
> If it can be done, does anyone have any suggestions on how to do it?
> Thanks.
>