Digital BW, The Print

Robert,

I do agree with your assessment but the prospect of using the new PiezoTone
black with the current MIS sets is still appealing. Since we would be
pushing the Dmax up from 1.7 to 1.9 we should still see some improvement
even if we have to give some density back in order to keep things linear.

The other issue is that we are reaching a level where it becomes harder and
harder for the human eye to distinguish differences in tone. I find the
visible difference between 1.8 and 1.9 to be pretty small myself but I can
clearly see the difference between 1.7 and 1.9. At the white end of the
scale the difference between 0.08 and 0.06 is quite noticeable.

Martin

http://www.borderless-photos.de/guests.html



----- Original Message -----
From: "Robert Morrison" <rmorrison@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Sunday, June 09, 2002 11:52 AM
Subject: Re: [Digital BW] PiezoTone with Epson Driver Dmax


> Very interesting Martin, however I would be surprised if you can maintain
> the dmax when you linearize the 80-100% section of the curve.  Invariably
> any adjustment up in this region seems to bring dmax down.  I've been
> working with an experimental 3rd party rip.  I'm capable of getting 1.88
> with the Piezotones and photorag...but when I linearize the shadow region
> the dmax comes down to 1.84.  Remember Jon's focus with the piezo driver
is
> to have a driver that can really show off shadow detail...I've studied
many
> of his profiles and this is almost always the characteristic.  From my
> experience this will always limit dmax somewhat...but it give you room to
> show off the 90-100% shadow detail...its a tradeoff in my experience.
>
> Robert
>
>
> On 6/7/02 10:06 PM, "Martin Wesley" <mwesley250@...> wrote:
>
> > With the original Piezo inks I and others have noted that the Epson
driver
> > with the same ink produces a deeper black than the Piezo drive. I
rechecked
> > this with the new Piezo tone inks. I printed a 1" 100% black square on
the
> > same piece of Photo Rag paper. First with the Piezo driver and then with
the
> > MIS-VM workflow and a RGB separation curve through the Epson Driver.
After
> > letting the printout sit for a couple of days (it does dry down by the
way) I
> > got the following measurements checking all four corners and the center
of
> > each square:
> >
> > Piezo driver: 1.80 to 1.82
> > Epson driver: 1.89 to 1.91
> >
> > To see if there was still low end separation with Epson driver I printed
out a
> > step wedge that includes 95% through 100% patches once again using the
MIS-VM
> > workflow. These lower tones gave the following readings:
> >
> > 100% - 1.89 - 190
> > 99% - 1.87 - 1.88
> > 98% - 1.85 - 1.86
> > 97% - 1.80
> > 96% - 1.78
> > 95% - 1.72
> >
> > This is not perfectly linear but the workflow used is not matched to the
inks.
> >
> > A Dmax of 1.9 is really quite amazing for a matte paper and brings the
matte
> > inkjet prints very close to silver print range.
> >
> > It will be interesting to see if the PiezoTone black ink can be used to
> > replace the standard black in the MIS-VM and MIS-FS sets. The black in
the
> > MIS-VM set has a Dmax of 1.7 to give you the comparison.
> >
> > Martin Wesley
> > http://www.borderless-photos.de/guests.html
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
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