Homebrew PCBs

Notice on page 4 the vicosities of the inkjet inks, very low compared to the materials at
Expess3D, almost the same as water.
 But this is all encouraging for alternates to regular ink. Now does anybody have the time to
reseach all of these print head makers and all of the ink substitutes and try them out? Surely
somebody has a few extra years laying around.