Digital BW, The Print

Jerry, I've been using epson dye black with my color MIS pigments for several 
years now.  It does give a significantly deeper black on mat and watercolor 
papers.  I also use it with MIS quads.  I found that I get the deepest 
blacks, as well as the most brilliant colors, on epson HWM, Archival mat, and 
Mediastreet royal plush.  All papers are not equal in their ability to give a 
good deep black.  Even with a slight difference in black an image looks 
significantly better, in my opinion.  

In my window tests, the epson dye black lasts well on some papers.  On 
others, it can fade fast.  The longest on HWM,  Royal plush and AM a close 
second.  There are others that tested out well, but I don't remember them off 
hand.  It also lasts well on photopaper.  On some papers, particularly the 
majority of watercolor papers, its life can be short.  It pays to do some 
window tests with a known combination to guage relative life.  I have done 
some testing with the MIS 1270 dye black.  It seems to be equivilent to the 
epson in blackness and longevity.  In contrast, the old MIS dye black had a 
very short life in my tests.