Digital BW, The Print

John,

Thank you very much for sharing this information. Very disappointing to put
it mildly. The Selenium PT out of the printer or unexposed to light is
wonderful but this is a gross failure. Just when I finally find something I
like... Sigh. The appearance of the MIS-FS print seems rather typical of the
warming we see with the carbon pigment inks, particularly the FS and
original Piezo inks. Hopefully the FS Neutral and Sepia-VM would have faired
a bit better in this comparison.

I also suspect that the failure is largely due to the poor black
performance. How far up the scale does the Randall workflow use the black
ink? The Piezo driver seems to keep the black below 80%.

With your permission I would like to place both of these jpegs and your post
in the Files section of the group's homepage. If you have scans of un-faded
copies of the print that would be nice to add too.

Martin Wesley

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



----- Original Message -----
From: "chervinsky02144" <chervinsky@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Tuesday, September 10, 2002 3:26 PM
Subject: [Digital BW] Piezotone SE vs. MIS FS: See Posted Images


> Hi,
>
> I would like to share with you the result of a rather primitive light
> exposure experiment that I have done with Piezotone SE ink and
> MIS FS ink on PhotoRag 308 paper.
>
> The images you are about to see were printed on two different
> Epson 1160 printers, one with MIS FS ink the other with the
> PiezoTone SE ink; the SE printer was flushed as per IJM's
> instructions prior to cartridge installation.  The Randall workflow
> was used because it produces a much darker D-Max than the
> Piezo driver; 2.00 compared to 1.77.  The prints were taped to a
> climate controlled office wall in a uniformly lit area.  The office
> has a large panel of windows leading to the outside and the
> walls and ceiling are painted white; it is quite a bright room,
> bright enough to not have to use the overhead lights at all. The
> prints were taped to the wall adjacent to the windows
> approximately two feet from them.  At no time during the days of
> the exposure did the prints see any direct sunlight; only reflected
> light.  The right side of each of the prints was covered with black
> opaque paper taken from a box of old photographic paper for the
> duration of the exposure.  The prints were mounted from 8/15/02
> - 9/4/02 or three weeks total.  Since the test, the prints were kept
> in a dark drawer and scanned on 9/10/02 on a flatbed scanner.
> Both prints were scanned in RGB color with the same scanning
> parameters.
>
> The Piezotone SE image is here:
>
> http://users.rcn.com/chervinsky/Photography/People/PiezoSE.jpg
>
> The MIS FS image is here:
>
> http://users.rcn.com/chervinsky/Photography/People/MIS.jpg
>
> The D-Max of the PiezoTone SE print went from 2.0 to 1.63 in the
> exposed area and stayed the same in the covered area.  The
> D-Max of the MIS print went from 1.73 to 1.72 in the exposed area
> and stayed the same in the covered area.  Densitometry
> measurements were done with a calibrated X-Rite 810
> densitometer.
>
> Subjective Assessment: I am greatly impressed with the general
> appearance of PeizoTone SE print as it comes out of the printer;
> the blacks are just spectacular, MUCH better the MIS FS ink.  I
> am also impressed with the inks overall neutrality.  I am,
> however, quite disappointed with the inks lightfastness.  Further,
> when the PiezoTone ink fades it tends to turn pink.  As I
> mentioned earlier the office is bright but I do not believe that it
> could be three stops brighter than display conditions.  I worry that
> after 6 months in display light that my prints will fade in a similar
> way.
>
> I hope this has been helpful to all.
>
> Thanks for your time.
>
> -John Chervinsky
>
>
>
>
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