Homebrew PCBs

My goal is to make accurate artwork for working with photoresist PCBs.
What suggestions do you have to make as high contrast (solid black) art work
as possible?  It could be inkjet (preferably) or Laser Jet.

What software driver to use to get better ink control and resolution than
the standard printer drivers?

I tried a Canon i9100 with both JetStar and Pictorico Premium OHP
transparency film.
The paper selection setting was the recommended Photo Paper Pro, highest
quality printing and max ink density.
The Pictorico worked best but I like to be able to get a more solid black.

Epson vs.  Canon: any significant advantage of either one?
TIA for any suggestions.
Bertho