Digital BW, The Print

----- Original Message -----
From: "Paul Roark" <paul.roark@...>
To: "DigitalB&WPrint" <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Thursday, October 17, 2002 5:19 PM
Subject: Re: [Digital BW] Preservation of Inkjet Hardcopies



Paul, you wrote:

> >... the encapsulation ...acrylic coating
>
> Have you seen good information that indicates the coating is acrylic?  My
> recent research in coatings does seem to indicate acrylic is the best way
to
> go, but there are all sorts of coatings out there (and different acrylics
> also).

IIRIC, it must have been Dave King who wrote that on a list and when asked
he came up with a webpage that had something to do with Epson itself. Will
try to check it.

> >>The complete rupture of a bond (cleavage), ...leads to the
> >>division of the molecule into two smaller ones, which
> >>will each have shorter conjugation lengths. (53)
> >
> >> [This color shift may be part of the warming we see with most dyes and
> >> pigments used in B&W printing.]
>
> >I thought that it would fade the other way then, getting colder.
> >Isn't it that the dye or other added colorant fades and the carbon
> >brown becomes prominent that gives the warming ?
>
> I think that with the dye-toned black pigments that probably is part of
the
> formula.  However, I see warm shifts in color pigments and pure black dyes
> also.

The first generation of Epson dyes lost the light magenta and yellow in
fading first and the print became green/cyan. The first Generations had a
bad yellow. I thought that suited the description.

Ernst