Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark" 
<paul.roark@...> wrote:
>
> > What are the percentages of gray ink,  in each respective 
cartridge
> > of the MIS UT-R2 inksets that go in the R220. Both the Neutral set
> > and the Warm set.  Is there a difference between gray ink density,
> > and ink percentage?
> 
> I don't think in terms of ink percentages, because it implies some 
absolute
> standard reference point.  Percentage of what?  Measuring the 
carbon content
> or density?
> 
> MIS occasionally uses a percentage number on its inks, but they 
should not
> be taken literally.  They are only used to indicate relative 
density, and
> the percentages used are not directly related to any content or 
measure.
> 
> The UT R2 midtone inks come in 2 densities and 2 tones (hues).  The 
neutral
> C & M inks are the same ink.  The neutral LC, LM, and Y are the 
same ink.
> Ditto for the warm inks.  The densities are the same as most of the 
other
> recent inksets I've worked on.  The carbon (warm) set is, in fact, 
the same
> as the UT2 and UT7 (and UT 3D) carbon.  These are standard 
densities that
> I've found to match the Epson driver assumptions and crossovers.  
All Epson
> hextone printers are surprisingly alike.
> 
> 
> > 
> > Would you be kind enough to explain what the chemistry is that 
makes
> > one set Neutral and one set Warm.
> 
> The warm is pure carbon.
> 
> The neutral has cyan and R800 clone blue pigments added to cool it 
down to
> close to neutral.  How neutral it is depends on the paper.  I try 
not to
> have it go green, however.   As such on most papers it has a very 
slight
> magenta or "selenium" tone. Lab a* between 0 and 1 is my ideal 
range for
> neutral a midtone with Lab b* = 0.
> 
> 
> > You suggest that by replacing the yellow positioned cartridge in 
the
> > Neutral set,  with that of a respective Warm cartridge,  it will 
warm
> > the Neutral prints.   Are there other combinations that you would
> > recommend juggling?
> 
> It's really a matter of personal taste and paper choice.  You can 
also mix
> (physically pour them together) the warm and neutral inks to any
> intermediate hue.  You can also use cool in the light and warm in 
the dark
> or vice versa for a split tone affect.  
> 
> Have fun; experiment.
> 
> Paul
> www.PaulRoark.com



Thanks much for you very detailed and direct answer.

Mike