Digital BW, The Print

>...UT inks on PhotoRag. I think I have discovered that the ink set 
>is only capable of a 1.34 max density with Eboni Black.

I consistently get about 1.7 with Eboni and PhotoRag.  1.34 is about what
the dark gray will be.  The Photo K is almost as weak.

Are you sure you have Eboni there?  

Print a dark gray 100% patch and see how it compares.  (Use the curves with
an RGB 100% patch and turn off 2 of the 3 inks by pulling their curves up to
a horizontal line at 255.)

Paul
www.PaulRoark.com