QTR-Quadtone RIP

>I was wondering if you could use QTR to create a profile 
> that would only use one ink (black, yellow, magenta, whatever).

In the Curve Creator (Tools>Curve Creation), I go to the "color" I'm
interested in, use the drop-down menu and click on Load Curve.  Then click
on the Curve button that is in what was the Density column.  In the box that
appears, click on the Point List tab.  I then make a straight line curve
from 0 to 100 simply by entering the coordinates (0, 0) as the first pair
and then (100, 100) as the second point. If you preview the curve you'll see
a straight line between those points.  Set the ink limit to 100.

I make these for black as well as whatever color I'm interested in.  I
usually name them, for example, K-0-100. 

Then to purge that color, simply print a block of 100% black.

I use these with 21-step test files to see the density range of particular
inks without having to wait for an entire Calibration mode print to be made.

Paul
www.PaulRoark.com