From: Linda Phillips (linda__phillips@hotmail.com)
Date: 01/29/01-03:14:31 PM Z
Ingo,
I loved your stuff, but am most intrigued by the metal process. Whereabouts
can one obtain "direct positive photo resist for the production of printed
circuits ", and instructions on how to use it? Does this work with an
all-or-nothing concept, i.e., it either lets the corrosive material get to
the steel or it doesn't?
Thanks again.
>From: Ingo <seedseven@home.nl>
>Reply-To: alt-photo-process-l@sask.usask.ca
>To: "alt-photo-process-l@sask.usask.ca" <alt-photo-process-l@sask.usask.ca>
>Subject: RE: On metal
>Date: Mon, 29 Jan 2001 20:31:08 +0100
>
>Original message from: Keith Gerling
> >Your work on metal is fabulous.
>
>Thanks :)
>
> >I, too have experimented with steel, but
> >have never gotten such an array of color - usually just the predictable
> >rust. How do you do this? Do you use different types of salts?
>
> Mostly I start with a lot of vinegar after that salty water. Every now
>and then a
>splash from the bottles that accumulate under the kitchen or darkroom sink,
>old
>developer, soda, a leftover from cyanotype etc. Sanding down parts that are
>to
>strong can give a dark grey in light grey image. To prevent parts from
>oxidation I
>put vaseline on the plates.
> Most colour though comes from a thin layer of copper that I apply on the
>steel.
>Poor vinegar over degreased plates then on that apply a strong solution of
>CopperNitrate. Copper can easily be turned in all kind of coloured salts.
>If you
>want to try on pure copper, go to an electronic shop for print boards. An
>excelent
>guide to patination with numerous receipes is:
>
>The Colouring, Bronzing, and Patination of Metals :
>A Manual for the Fine Metalworker and Sculptor
>by Richard Hughes, Michael Rowe, 1991
>Whitney Library of Design; ISBN: 0823007626
>
>Ingo
>
>--
>Photography: http://members.home.nl/ingoogni/
>Pov-Ray : http://members.home.nl/seed7/
>
>
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