Digital BW, The Print

> ...

> 1. Will PKN ink work with UT7 inks in the printer.

PKN is for glossy printing.  So, if you put PKN in the K spot, you can do
quite good BO printing on glossy papers, which is really a big benefit for
color printers who want an occasional B&W glossy print.  It's quite neutral
and has relatively low bronzing, especially on Kirkland.  

But, if you're using UT7, you don't need to do this.  UT7 with Eboni
installed prints very nice and neutral glossy prints, which can be quite
neutral even down into the deep shadows -- because it is not using the warm
PK or Eboni there.  The black tone can be controlled by the ratio of UT7 C
and M position inks (Red and Green curves) used in the curves.  



> 
> 2. Will this ink show improvement only for gloss paper
> (recommendations?) or for matte as well.


PKN only works for glossy printing.  With matte printing you need to use
Eboni (or other matte black), and I have not been able to make a good
neutral version of a matte black.  The pigment loading of Eboni is very
high.  Addition of color pigments to cool it lowers the dmax unacceptably --
to me.

 
> 3. How is this ink different from using Eboni Black or Photo Black
> of UT7 inks for the BO process?

PKN has "blue" pigment toner in it.  Given the spectral characteristics of
carbon and the blue toner, the complementary absorptions result in a dmax
that is higher than either pigment by itself -- but only at the lower loads
needed for optimal glossy dmax.


> 
> BTW, I'm using EEM and PR at the moment.

Stay with UT7 and Eboni.  PKN is really for color glossy printers or C86
users.  You won't really benefit from it if you're using UT7.

Paul
www.PaulRoark.com