From: Eric Neilsen (e.neilsen@worldnet.att.net)
Date: 01/15/02-08:26:02 PM Z
Carl, This is why it is a good idea to have "extra" oxalic acid in the
ferric to help slow or prevent the aging.
Eric Neilsen
Eric Neilsen Photography
4101 Commerce Street, Suite 9
Dallas , TX 75226
214-827-8301
Web Sites : www.ericneilsenphotography.com
http://e.neilsen.home.att.net
----- Original Message -----
From: "Carl Weese" <cweese@earthlink.net>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Tuesday, January 15, 2002 12:51 PM
Subject: Re: Papers
> Wendy,
>
> Crane Cover 90# Natural White is a fine starting point. If you are
starting
> out, don't jump around changing papers and adding that variable. Get to
the
> point that your results are consistently good before experimenting to see
if
> some pictures will be better with another paper. Avoid the other colors of
> Crane cover since many find they give erratic results, and that's just
what
> you don't want especially while learning the other basics of the process.
>
> I'm not a trained chemist. I understand that ferric oxalate "ages" and
goes
> bad when the ferric turns to ferrous, and that the same thing happens much
> more rapidly in the coated sheet with combined sensitizer. It seems likely
> that any contrasting agents in the coating will accelerate the process
> farther, but I'll let those with chemical training deal with those
answers.
>
> ---Carl
> --
> web site with picture galleries
> and workshop information at:
>
> http://home.earthlink.net/~cweese/
>
> ----------
> >From: Wendy Gollihue <wgolli@flash.net>
> >To: alt-photo-process-l@sask.usask.ca
> >Subject: Re: Papers
> >Date: Tue, Jan 15, 2002, 1:41 PM
> >
>
> >
> > Alot of persons around me are using the cranes. I usually go the road
less
> > traveled and experiment at great costs. In this process, i'm wondering
if I
> > should just join the club.
> >
> > Could you briefly tell me what chemical reactions may be going on?
> >
> > Thanks alot for your help.
> >
> > Wendy (TX)
>
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