Digital BW, The Print

Hi Daniela,
 
> ... Eb6-CondorBW-12-07.quad profile... looks
> made for a K3 printer.

That QTR profile is for my 7500.  The *.qidf file indicates the printer 
model.

> The curves for individual ink are very unconventional, 
> with very large overlaps (although not as extreme as
> in the Piezography curves).

I hand make curves as opposed to using the QTR semi-automatic 
partitioning, although I sometimes start with that and then pull 
the "skirts" out as needed to eliminate microbanding.  As I get into 
the middle and dark midtones, I like to have 3 or 4 channels firing.  
What I do not like, however is more than the MK firing at the 100% spot.

The Eboni-6 inkset is essentially the commercial version of Carbon-6.  
Both have 6 different densities of ink.  The Eboni-6 uses dilutions 
that relatively closely match the normal MK, UT/Piezo-C, UT-LC series 
and the (PK omitted), LK, and LLK, with an "LLLK" added.  Each of these 
series is based on a 30% dilution ratio, with LK being between MK and 
UT-C.  The difference from Carbon-6 is that I made that series based on 
an initial 1:2 (1 Eboni: 2 clear base) dilution and then a cascading 
1:1 dilutions for the remainder so that those without good scales could 
mix it.  The 2 inksets are close enough that the profiles for one will 
probably be within linearization reach of the other.

> Does it give you the usual problem of banding in the areas closest 
> to the paper edge?

No.  In my experience that is a problem of desktop printers that use 
1.5 pl drops.  Eboni-6 and Carbon-6 on all of my non-1.5 pl printers 
are exceptionally smooth all the way to the normal printer borders.

Carbon-6 is not recommended for 1.5 pl printers at all.  I'll try Eboni-
6 in the 1400 at some point, but since it does such a good job of 100% 
Eboni with a simple QTR BO curve, I'm not sure how much need there is 
for more.

While the curve you were looking at was for the QTR rip, my usual 
workflow for the Eboni-6/Carbon-6 inksets is the Epson driver with an 
ICC made with QTR's Create ICC-RGB.  I prefer to print from Photoshop 
(Windows) in a "Color Managed" workflow.

Paul  
www.PaulRoark.com