Digital BW, The Print

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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