I had played with EFI Fiery and there was an option of using blank ink only on the HP Designjet 130.
EFI does not support desktop printers like you do Wonder if it's possible to do that. I wanted to print some blank and white photos with blank ink only - and not with the colors mixed to be shade of gray.
I have a epson ET 2750 and the above only works if you have selected Matte or Plain paper.
If you select semigloss, gloss or other paper type the printer uses all the colors to build the black and greys tones.
your printer only has pigmented black and cyan, magenta, yellow inks. The pigmented black is not compatible with photo papers but only for matte or plain paper. When using photo papers, black must be mixed by combining all color inks. Some Epson printers also have a photo black ink which can be used on all papers where pigmented black is not suitable.