Digital BW, The Print

Hi, found a second hand Epson 1160 and bought MIS Ebony black and UTFSN 
Color Pos. Had b&w image, set curves like in the Hobman article and 
printed as RGB on A5 Epson archival matte. The output is very greyish, 
is there any good workflow description out there that takes me step by 
step through this learning process?
TIA, Hans