Digital BW, The Print

I just got a set of UT-14 inks to use on R280 and I'm trying to understand PR's accompanying PDF. It says:

"Glossy Papers
The system prints on glossy paper with its midtone, MIS UT type glossy- compatible inks. Because the 100% black is formed with a combination of the C and M inks, Eboni (MK) must not be used. As such, a Photoshop curve, ICC, or QTR must be used to print glossy prints."

It says "or QTR", implying that ICC and PS curves are meant to use with Epson driver. How can one prevent Epson driver from using K ink by use of ICC profiles or PS curves? I cannot wrap my head around this. Many/most RGB values will be printed by Epson driver using K ink, and it would be practically impossible to work around it, as far as I can imagine. What am I missing? With QTR, of course, it is another story.