Digital BW, The Print

For those interested in QTR toning through an "ultrachrome" set on k3  
printers, I would suggest buying compatible Cone Neutral inks for K3 K  
shades 1,2,3. I did this back in the day on a 9600 using a CMYK  
profile through StudioPrint. Neutrals were amazing and surpisingly  
little dots. QTR would most likely do an even better job and still let  
you fully control your multiple split tones. Of course, you won't get  
nearly as much physical resolution as a septone piezo setup, but you  
will get the adaptability required by some photographers that a single  
or even dual ink setup does not always offer. If anyone here does it,  
let me know how it turned out.

Of course, on the color printing end, you will need to use a CMYK rip  
that you can linearize for the now-neutral K channel.

all the best,
Walker