From: Eric Neilsen (e.neilsen@worldnet.att.net)
Date: 07/28/01-10:29:44 AM Z
Nick, The reduction of the print may be possible but at what cost? The
substrate may be severally compromised. It work be best just to make
another print.
I had tried some HCL on a print awhile back, it seemed to do some reduction.
I suppose that at some point in the printing process, many printers run into
the "only if it were a bit lighter" . Good luck on your efforts.
EJ Neilsen
----- Original Message -----
From: "Istvan Bibo" <bibo969@hotmail.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Wednesday, July 25, 2001 6:16 AM
Subject: Re: Reducing a PT/PD print
>
>
>
> >From: Nick Makris <nick@mcn.org>
> >Reply-To: alt-photo-process-l@sask.usask.ca
> >To: Alternative Photography <alt-photo-process-l@usask.ca>
> >Subject: Reducing a PT/PD print
> >Date: Tue, 24 Jul 2001 06:40:17 -0700
> >
> >Has anyone successfully thinned/reduced a slightly dark PT/PD print? My
> >guess is that by doing so, the thinning may not occur uniformly, but that
> >in
> >doing so, one might come up with a surprise abstract of the original.
Any
> >ideas are welcome.
> >
> >Many thanks,
> >
> >Nick
> >
>
> Nick,
>
> I read somewhere, that nitric acid can reduce pd prints. I gave it a try
by
> using 10% nitric acid (quite strong). After 1 day no significant reduction
> was visible. By accident I left another small piece of pd print in the
acid
> for two weeks or so. The print was reduced but not exessivly and the part
> that was not in the acid became brownish yellow. So I think it is not the
> way to go.
> On the other hand I discovered something interesting (at least to me):
> When I put a pd print in household Clorox and then into hydrochkoric acid
> the complete pd print washed down the drain! Only white blank paper was
> left! It was stunning to me because PT/PD prints are said to be chemically
> very resistant. After this I experimented with this lethal combo no
> further. Maybe you will.
>
> Istvan
>
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