How to set ICC profile?

hallo,

- I'm with:
HP officejet 6830 pro
Windows 10 Home

- my aim:
save black ink

- how accomplish that:
I think (if I'm not wrong...)
it could be accomplished
by using an icc profile (edited by me)
where I substitute the 'black' color with a 'dark grey' color
and then
by telling the printer to use this icc profile,
so the printer will never print blak
and will always print dark grey

- answer:
is this method correct?
(if it is correct, I will ask you few questions
on how to tell my printer to use this new icc profile)