QTR-Quadtone RIP

Paul, 

Thanks so much for doing this. I am eager to see how well this works
out. Once you get it going and working well, will I be able to call
inksupply.com and have them send me the same thing you did?

I think this will be a great option for R1800 users. Right now the
only good option for smooth b&w (of this level) is with the K7 set.
Everyone says to go buy a r1400, but I have 2 r1800 and rather use it
then buying another printer.



--- In QuadtoneRIP@yahoogroups.com, "Paul Roark" <paul.roark@...> wrote:
>
> Shane,
> 
> > Any word on this? I am interested as well. Right now I am still
> > trying to decide between this, GQ2 and piezography set.
> 
> MIS is sending me Eboni-6/1800 carts today.  Using my 1400 as a test
bed, I
> think I have an ink arrangement and QTR profile structure that will
work.
> For the 1800 I'll double up on the Y and LM (lightest inks) and keep the
> 3-MK as is (MK, PK, and GL).  This should allow us to overcome the
1800's
> banding problems.
> 
> The trick with the 1.5 PL printers is to hold down the increase in Lab B
> from the carbon.  By avoiding the middle dilution (warmest) inks (LC
and M),
> I've been able to hold Lab B on Premier Art Smooth BW to about 1 in the
> midtones.  
> 
> It's rather interesting how the arrangement evolved.  I started out
seeing
> how much I could do with just the lightest ink -- Eb6-Y -- and Eboni MK.
> They are the "coolest" of the carbon inks.  Eb6-Y on PA BW goes to
about Lab
> B = 0 and just stays there.  So, I used as much of that as I could.
 Then I
> added only those inks needed to close the gap between this Y and the
Eboni
> so as to make a totally smooth print.  LM, the next lightest ink
goes to a
> max of about Lab B=1 on PA BW.  I tried to go from that straight to
Eboni,
> but on close inspection I could still see some roughness.  So, I
sprinkled
> in just enough Eb6-C to hide that.  So, there are basically 4
dilutions of
> Eboni-6 used -- that is, it ended up a classic "quad."  
> 
> On the 1800, I'll just stick redundant Y and LM inks in the Blue and Red
> spots to hide the banding and keep my preferred tonality.  (For
those who
> want greater warmth Eboni LC and M could be installed, and profiles
can be
> written to use more of the warmer inks.  Paper choice, of course, is the
> main factor in tone control with Eboni-6.)  I'm hopeful on the 1900
banding
> will not be a problem, and we'll be able to use the large number of ink
> positions to do something interesting.  
> 
> At any rate, aside from using the dilutions that MIS already has on the
> self, this effort started with a clean piece of paper.  What's rather
> interesting is that the final result looks a whole lot like the original
> PiezoBW quad arrangement -- 2 very light inks, then a large dilution
gap to
> a rather dark C and MK.  
> 
> I've pulled my 1800 out of storage and will set it up with this Eboni-6
> arrangement.  With the 3-MK still in it, I'll be curious how the QTR
sliders
> work to allow further tone control.  Needless to say, at least on
the 1400,
> the Eb6-quad setup makes extremely smooth prints.
> 
> Paul
> www.PaulRoark.com
>