Digital BW, The Print

Ben,

>... UT-3D inkset in my Epson 1290 ...
>... printed the QTR calibration page, and 
> the primary toner (magenta and light magenta position) inks 
> look quite different to each other. Whereas the 
> LM position ink is distinctly bluish, 
>the M position is much more of a cool gray ...

That's intentional.  The LM is going to be the main toner in the parts of
the image where tone matters most.  The LM contains the usual cyan-blue mix.
However, with most if not all papers, a toner with that mix goes too magenta
in the deep shadows.  So, more cyan is used there.  The M-position toner
also does double duty as a PKN -- neutralized PK.  So, the amount of toner
to carbon is also considerably less than with the LM, but it should have
enough there to handle the shadow tones.

Good luck with the system.

Paul
www.PaulRoark.com