Digital BW, The Print

----- Original Message -----
From: <jimhayes@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Friday, December 13, 2002 12:27 AM
Subject: [Digital BW] Re: UltraChrome outgassing


> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark"
> <paul.roark@v...> wrote:
> > There is a  thread on the Epsonx7x list has a lot of discussion
> about the
> > UltraChrome outgassing issue. <snip>
>
> >
> > I could not tell from the thread whether this problem is unique to
> the
> > UltraChrome inks or not.
>
>
> From what others have posted, apparently not. In fact, one person says
> the dye inks are worse (1270 experience).
>
>
> I recommend going to this post on the x7x list: message #10263 by Jack
> Schultz. He has written what amounts to a small treatese on the
> subject. He has seen it with HP printers too...well I guess about ALL
> inkjets. If he knows what he's talking about apparently the glycols
> which act as a base for many inksets outgass. It can be solved by
> putting a piece of paper over the print for 24 hours. And matt papers
> are not affected-unless they have an RC barrier on them if there is
> such a paper.

The glycols may cause the outgassing. They could condens to the colder glass
plate in front. We have discussed this in the past on the Leben list when it
was observed to happen with the Epson dye inks.
There was even mention of more or less an image transfer to the glass. It
wouldn't surprise me if a lower fraction is carried with the glycol as well
and stays on the glass when the glycol has evaporated from the glass.
Is there glyzerine in the inkmix like there is in Ilford's Archiva ink?

Ernst