Digital BW, The Print

Quick question concerning the abbreviations used in QuadTone for 
the "curves" listed in the dialogue box. For example "UCpk-
EPremSemiGloss-cool" and "UCmk***" ... UC is I assume Ultra-Chrome 
Ink but what about the "pk" and "mk"? 
 Concerning Metermerism, I decided after some investment of time 
trying to print Black & White prints on my Epson 2200 that were free 
from metermerism, that I was not going to risk clogging my printer 
head nozzles with a non-Epson ink. The answer seems to be a RIP and 
the first one I have tried, QuadTone has produced very nice 
prints...free of metermerism. My thanks to the guys that developed 
this software. Any suggestions or tips from more experienced users 
concerning it's use would be appreciated. Thanks, Sm

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "S.Martin" 
<view_camera@y...> wrote:
> UC is I assume Ultra-Chrome 
> Ink but what about the "pk" and "mk"? 

In the context of colour, RGB and CMY denote the primary and 
secondary colours.  As B is already used, K is used for black.  PK is 
therefore photo black and MK is matte black.

John