Digital BW, The Print

The encapsulated pigment inks are encapsulated in a poly resin. The Epson "archival" 
inkset as used in the old 2000P, 7500,9500, and CF 10K printers use this inkset. I thought 
Epson had a patent on this technology ( and offered it to other companies for a price) but 
there could be other companies that market this kind of pigment also. I just don't know 
about that. 

The encapsulated pigments were designed to give the color pigment inks more saturation 
while making them more water resistant. My feelings is that before these inks became 
available pigment inks looked a little flat and chalky. I have never had too much problem 
with saturaton of the Epson archival inkset but the mononochrome content without 
metamerism has always been problematic.

The new Ultra-Chrome inks Epson had released increase this saturaton in the yellow 
channel even more, making them easier to work with when it comes to the warmer side of 
the color gamut and the metamerism in monochrome work is greatly reduced. I'm sure 
there are companies out there attempting to copy these inks if they haven't already done 
so. If so, how reliable their production standards are is an issue worth checking into.