Digital BW, The Print

Recently I got a cartridge of MIS Eboni to try in my Black Only 
printing on an Epson 2200.  I have been using the standard 2200 
driver on my Mac G4 and Epson Enhanced Matte paper.  

I am pleased with the more neutral tone of the Eboni prints, but I 
have noticed that the depth and richness of the print have been 
diminished.  The blacks are not as deep and the highlights look less 
radiant than the prints made with Epson matte black ink. In general 
the Eboni tonal scale looks much narrower.

Is this unavoidable, or is there a way to get more tonal scale out of 
Eboni ink?  Is there a curve or a driver or something that was 
developed for BO on the 2200 using this ink?  If this is as good as 
Eboni can do, I think I will live with the brownish Epson ink. Thanks.