From: Linas Kudzma (lkudzma@earthlink.net)
Date: 01/14/02-10:38:16 PM Z
Carl,
Paper coated with only FeOx and metals, with the Pt component being
Na2PtCl6, can sit in the dark for days without any bad effect. I'm using
Na2PtCl6 (sodium chloroplatiATE) as the contrast agent (typically 20% of
the metals). In fact, sometimes I like the prints better from such paper
that sat in the dark overnight. Maybe this is due to a slower, more even
drying? This is for DOP prints on Cranes Cover 90 Natural.
Previously, when I used chlorate for contrast, letting paper sit overnight
was not possible. This was without a doubt due to side reactions of the
chlorate, which is a very reactive oxidizer. The Na2PtCl6 salt is very
stable and a nice contrast agent.
Linas
> [Original Message]
> From: Carl Weese <cweese@earthlink.net>
> To: <alt-photo-process-l@sask.usask.ca>
> Date: 1/14/2002 12:35:02 PM
> Subject: Re: Papers
>
>
> > Wendy: Internally sized. Very textured surface -- not good or bad,
just a
> > question of whether you want that or not for a given image. Tough,
heavy
> > paper. YOU HAVE TO "RE-ACIDIFY" IT for pt/pd printing,
>
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