How do I print single colors out of my printer?

[InkIntel]

I'm an ink formulator trying to use a desktop printer to print individual colors, but I haven't found a printer that will let me print only one color (except black of course). Even if I print a yellow image - the output is never pure yellow (often has dots of blue or even magenta in it) because the printer is trying to "match" the specific shade. This is fine for normal use, but not helpful for me when I'm trying to assess individual color values. I'm looking for a printer (any inkjet model) that will let me print only yellow, or only magenta or only cyan. Thanks for any help!

 

[Rhayader]

To print pure colours, you could try Quad Tone Rip (50$ shareware) and one of the supported Epson printers. QTR must be set in calibration mode.
Depending on the output you need, you might have to create your own flush image.