QTR-Quadtone RIP

>Can someone tell me if there is any difference between UT7-Ebony K 
> and K4-K,

All MIS Eboni matte black is the same.  It's used in all of the inksets.
Beware of "universal" black that MIS sometimes labels "MK".

> between UT7-PK and K4-PK ?

There is a difference.  Modern printers -- since about the R220 -- do better
with a lower load PK.  K4-PK is optimized for the newest printers.  The MP
and 7600 PKs are aimed at K2 and older printers.

Paul
www.PaulRoark.com