QTR-Quadtone RIP

Hi Jason,

As I was a bit intrigued your post I checked out the link the Ken 
provided and I played a bit with the hue/saturation curves he 
suggested. It turns out that the platinum and platinum curves do not 
seem to provide any greenish tones at all.... They are more in the warm-
brownish area. Isn't that what you're seeking for?

I checked a bit the Lab a and Lab b values one gets with these 
hue/saturation curves, but most of them are around Lab b ~ 5-7 (so 
towards the yellow, but desaturated enough to use carbon only and not 
needing yellow) and Lab a ~ 2 (so just a bit towards the red). Such 
tone should be very easy to achieve by mixing a warm QTR curve and a 
selenium QTR curve. As a matter of fact, this turns out to be one of my 
favorite settings of my 2100 + UT3D inks (an inkset that includes a 
specific selenium toner). (Unfortunately, my 2100 passed away this 
summer and I am now getting up to speed on my new 3800 + UC inks.)

However, I checked the provided QTR curves and there do not seem to be 
any selenium curves for the 2400. So, you're still on your own to 
create that. As said in my earlier post, I'm currently working on a 
selenium curve for the 3800. I'm happy to share it, but it will only 
work for you as source of inspiration.

I'm not sure how serious you are in this, but if toned B&W printing is 
really your thing, I would seriously consider to set up a dedicated 
printer with UT3D inks.

Joost