Digital BW, The Print

Hello, i'm new to this group.  i have begun printing Photos to be 
painted upon onto Arches Cold Press and have gotton the results i'm 
after using a 2200 with epson's Matte Black ink.  The prints come out 
sort-of platinum-like - slightly soft but pleasing so.  I'e also used 
the "watercolor" profile with the Epson software.

Now my question - what would a change of ink do - e.g. - the Ebonie?  
And does the BO use any of the light black or only the dark black.  
Thanks very much...Michael Vendrell