Digital BW, The Print

Hello

I am a low-volume printer

and I don't care about variable-tone printing. Some time ago I quit
using the Original MIS Quadtones and gave MIS EBONI Black (in a
prefilled cartridge) a try using MIS ARC-SO20089-QUT "3-Color" for
variable-tone prints (EPSON 1160 / EPSON Archival Matte). BO printing
is fine (apart from slight microbanding from time to time, which I can
cure with MIS's (black) purge pattern on top of running 1 or two
cleaning cycles and of course the inevitable "dottiness", which in
most cases isn't a problem for me at all):

But: using Paul Roarks curves, I am not at all pleased with the
results, because the "hue" ist not constant over the density curve. I
am getting a bluish/greenish tint in the higher zones with the
nc-curve etc., wheras the lower zones in the same curve are fine.

Anyway.I am sure it's got nothing to to do with Paul Roarks curves
whatsoever, but perhaps rather with the fact that I am a low volume
printer and that after a certain lapse of time the "color"-inks are
not fresh enough any longer to do their job properly.
So I have decided to go back to the non variable-tone print technique
 I once had with the original MIS QUAD-tone inks.

And here is my question:  Is there an Eboni-black based inkset which
technologywise is the equivalent of the Original MIS Quadtone inks???
(i.e. shades of gray in the "color" cartridge (75/50/25)being
(clear-solvent) dilutions of the 100%Ebony K)or am I to buy either the
FS or FSN inks from the "UltraTone Ink Family". And where could I see
the difference between the two hues, please.

Thanks a lot for your help and info

Chatzebussi