Digital BW, The Print

Robert,

From what I see, Piezo has green dye or pigment in at least the 
Magenta position and Jon Cone has said that there are dye components 
in Piezo. I really wouldn't want to pick one over the other for 
archival life.

Paul reported earlier that in his UV fade tester the Piezo warm 
shifted more quickly than MIS VM but that they both eventually reach 
very similar points. Not a plus for either of them but they seem to 
be the best we have to work with at the moment.

At this point I really don't know what to expect over the long, long 
haul. I think it will be display and storage dependent. The Piezo or 
MIS prints that last the test of time are likely to be the ones that 
spend less time exposed to intense UV light sources. Of course a coat 
of quality varnish would probaly help.;-)

Martin



--- In DigitalBlackandWhiteThePrint@y..., "Robert G. Morrison" 
<rmorrison@p...> wrote:
> I'd me amazed if they weren't.  The beauty of piezo (or straight 
MIS) is
> that all the ink is pure black. No two pigments have the same fading
> properties, so it would be amazing in blue faded at the same rate 
as black.
> Most likely, it will fade faster because carbon black is the most 
stable
> pigment known.  If this happens quickly it could be a major problem 
for the
> MIS VM inkset for archival applications.  I'm not sure how Cone is 
achieving
> the Selenium Toned set...but the problem could be the same.
> 
> Robert
> 
> On 9/13/01 12:00 PM, "mwesley250@e..." <mwesley250@e...>
> wrote:
> 
> > Robert,
> > 
> > Are you thinking the blue components will be more susceptible to 
UV
> > fading?
> > 
> > Martin
> > 
> > --- In DigitalBlackandWhiteThePrint@y..., Robert Morrison
> > <rmorrison@p...> wrote:
> >> Got it.  Antonis and I are using his spectrophotometer to read 
the
> > 21 step
> >> wedges.  I have previously reported the dmax for the 100% black.
> > We have
> >> full spectrum information but haven't figured out how best to
> > communicate
> >> the information.  Just looked at the your scan that martin 
posted.
> > Do you
> >> have a fade of a more neutral MIS sample.  The one that I see is
> > very warm
> >> to even the piezo.  My guess is that as you tone the MIS blue 
that
> > you will
> >> bet much poorer fade results...but that is just a guess.
> >> 
> >> Robert
> >> 
> > (snip)
> > 
> > 
> > 
> > Please visit the Group Homepage to check the Files, Bookmarks, 
Polls and other
> > resources as they are often being updated. The page is at:
> > 
> > http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint
> > 
> > 
> > 
> > 
> > Your use of Yahoo! Groups is subject to 
http://docs.yahoo.com/info/terms/
> > 
> > 
> 
> ----------------------
> Robert Morrison
> rmorrison@p...
> 
> 310-397-2704
> 
> 4131 Bledsoe Ave.
> Los Angeles, CA 90066