Digital BW, The Print

Greetings, I have been fiddling with the Nanochrome for BW prints.  
Most of my test have been done using the Bowhaus IJC/OPM software on  
an Epson 9600. I find that the neutrality that both the Black/Light  
Black have in themselves a real benefit. DMAX is also very good. On  
PhotoRag 308 I have measured DMAX very close to 2.4. Nothing I have  
printed with sofar have matched this black level. I am very impressed  
with these inks.

-ole/norway

You must have different ink than what I have.  I've posted here measurements
of both the K and LK ink and they are far from neutral - they're very cold,
about as cold as I would ever go cooling a warm carbon ink set with LM and
LC.  You're getting an L* of 3.7?  I have measured scales of ink load and
never found density to exceed 2.0.  The L* 8.4 I measured below is the best
I've seen but it's not workable.  I'm surprised you are getting such
different results.  IJC/OPM and QTR use the same driver at their core and I
would not have thought there'd be that much difference simply from the 7600
vs the 2100 - at least not at dMax.

I think I have a reasonably close to neutral QTR curve now.  It required a
toner curve for adding LM and a different one for adding Y.  A painful
exercise.  I'll post the results when I'm finished.

These inks will be problematic for anyone looking to use them conventionally
with the Epson driver (ie for colour).  The ink limits in there are going to
cause problems for these inks.  My GG2.2 step wedge on HPR has now had a
couple of days of drying.  Here are the 85, 90, 95 and 100 steps:

14.3 1.1 0.6
9.9 1.8 0.3
8.4 1.7 -0.5
9.6 0.8 -0.8

Note the inversion that occurs due to excess ink limits.  I no longer have
the same printout on EAM but the results will have been much worse.  If
these inks pass the longevity test then a RIP will definitely need to be
considered.  These are cheap for B&W but less so for colour.

> From: Ole Christian <piezoo@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Mon, 16 Jan 2006 00:12:08 +0100
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: [Digital BW] NANOCHROME BO
> 
> Greetings, I have been fiddling with the Nanochrome for BW prints.
> Most of my test have been done using the Bowhaus IJC/OPM software on
> an Epson 9600. I find that the neutrality that both the Black/Light
> Black have in themselves a real benefit. DMAX is also very good. On
> PhotoRag 308 I have measured DMAX very close to 2.4. Nothing I have
> printed with sofar have matched this black level. I am very impressed
> with these inks.
> 
> -ole/norway

Is Ole perhaps printing on HPR SATIN?

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Steve Kale 
<stevekale@b...> wrote:
>
> You must have different ink than what I have.  I've posted here 
measurements
> of both the K and LK ink and they are far from neutral - they're 
very cold,
> about as cold as I would ever go cooling a warm carbon ink set with 
LM and
> LC.  You're getting an L* of 3.7?  I have measured scales of ink 
load and
> never found density to exceed 2.0.  The L* 8.4 I measured below is 
the best
> I've seen but it's not workable.  I'm surprised you are getting such
> different results.  IJC/OPM and QTR use the same driver at their 
core and I
> would not have thought there'd be that much difference simply from 
the 7600
> vs the 2100 - at least not at dMax.
> 
> I think I have a reasonably close to neutral QTR curve now.  It 
required a
> toner curve for adding LM and a different one for adding Y.  A 
painful
> exercise.  I'll post the results when I'm finished.
> 
> These inks will be problematic for anyone looking to use them 
conventionally
> with the Epson driver (ie for colour).  The ink limits in there are 
going to
> cause problems for these inks.  My GG2.2 step wedge on HPR has now 
had a
> couple of days of drying.  Here are the 85, 90, 95 and 100 steps:
> 
> 14.3 1.1 0.6
> 9.9 1.8 0.3
> 8.4 1.7 -0.5
> 9.6 0.8 -0.8
> 
> Note the inversion that occurs due to excess ink limits.  I no 
longer have
> the same printout on EAM but the results will have been much 
worse.  If
> these inks pass the longevity test then a RIP will definitely need 
to be
> considered.  These are cheap for B&W but less so for colour.
> 
> 
> > From: Ole Christian <piezoo@m...>
> > Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> > Date: Mon, 16 Jan 2006 00:12:08 +0100
> > To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> > Subject: [Digital BW] NANOCHROME BO
> > 
> > Greetings, I have been fiddling with the Nanochrome for BW prints.
> > Most of my test have been done using the Bowhaus IJC/OPM software 
on
> > an Epson 9600. I find that the neutrality that both the 
Black/Light
> > Black have in themselves a real benefit. DMAX is also very good. 
On
> > PhotoRag 308 I have measured DMAX very close to 2.4. Nothing I 
have
> > printed with sofar have matched this black level. I am very 
impressed

> > with these inks.
> > 
> > -ole/norway
>

Ole 

Can you post some results from a single K channel curve with IJC/OPM?  Also
presumably you did a calibration chart for your IJC/OPM curves work.  If you
could post some data for the LK that would be helpful.

Steve


> From: Steve Kale <stevekale@...>

> <snip>
> You must have different ink than what I have.

<snip>

>IJC/OPM and QTR use the same driver at their core and I
> would not have thought there'd be that much difference simply from the 7600
> vs the 2100 - at least not at dMax.
> 

> 
> 
>> From: Ole Christian <piezoo@...>
>> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
>> Date: Mon, 16 Jan 2006 00:12:08 +0100
>> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
>> Subject: [Digital BW] NANOCHROME BO
>> 
>> Greetings, I have been fiddling with the Nanochrome for BW prints.
>> Most of my test have been done using the Bowhaus IJC/OPM software on
>> an Epson 9600. I find that the neutrality that both the Black/Light
>> Black have in themselves a real benefit. DMAX is also very good. On
>> PhotoRag 308 I have measured DMAX very close to 2.4. Nothing I have
>> printed with sofar have matched this black level. I am very impressed
>> with these inks.
>> 
>> -ole/norway