Digital BW, The Print

Gareth,

>Where do the Ultratone inks lie in all of this with regard to
>permanence, Paul?

My tests indicate that the Epson UC black, including light black, are about
like the similar MIS black.  These (as well as Piezo Museum black) are
extremely lightfast inks.  I also think the color pigments are close.  (MIS
may have tests that indicate that the MIS 7600 colors are a bit better.)
These black inks appear to be more lightfast than the color pigments.
Wilhelm's tests also show this.

The UltraChrome black and white ratings by Wilhelm are, thus, close to what
the Ultra Tones would probably be.  However, since the Epson UC "black and
white" prints appear to have more color pigment in them than the MIS UT
inks, and since the color pigments are less lightfast than the black
pigments, I suspect the MIS UT inkset (& PiezoTone WN & Selenium) would
outperform the Epson UC inkset in B&W mode.

Paul
http://www.PaulRoark.com
___________________________________

> This is the Wilhelm page that has the new
>110 year dark storage estimate for EEM (and others):
>
> http://www.wilhelm-research.com/ep9600%20print%20permanence.html

__________________

>...
> ... Wilhelm is now (July 25, 2003 posting) saying EEM with
> B&W UC pigment printing is good for >150 years of display
> and 110 years of dark storage?
 _____________________

>... Recall that he'd previously said there would be
>yellowing in 30 years with EAM.
>
> I noticed a change in EEM/EAM about the time
>Wilhelm made the 30 year yellowing statement, and I
>guessed the remark had caused Epson to address
> that disastrous statement.

>Now the cynic in me wonders ...