Digital BW, The Print

I know this forum is primarely for black and white so my apologies 
in advance.  I want to do some color work that is "archival"  I am 
confused as to which one to use, MIS original archival or MIS GP 
ink?  I have an epson 1280 and primarely print on matte paper of 
various sorts.  Also I do a lot of black only (BO) printing a la 
Clayton Jones, however I understand the black used in the  orginal 
or GP inks is not Eboni black.  Mr. Jones do you have any experience 
with the blacks contained in these ink sets?  If not could I 
subsitute Eboni black for either?  Thanks for your help.

Joe