alnovo@inwind.it
Date: 05/08/01-11:57:32 PM Z
Many years ago I made some images on brass, using a photoresist laquer as sensitizing medium, and "developing" with a simple solution of sodium sulphide. Don't ask me about concentration and times, it was made by visual inspection.
The colour is a deep, semi-matte black-brown (depending on the thickness of the copper sulphide layer -brass is a copper-zinc alloy)
Alberto
Richard Knoppow wrote:
> >Darryl Baird wrote:
> >Jewelry supply outfits carry a variety of black patina chemistry. As I
> >recall, liver of sulfur will darken, if not blacken brass. Use the words
> >"metal patina" on a WWW search.
> >
> >good luck
> >
> >-Darryl
> >~~~~~~~~~~~~~jportale wrote:
> >> {snip}
> >> If one insists on going the chemical route, I would ask around an old time
> >> hardware store or a shop that sells patina chemicals for metals. They may
> >> have something..
> >
> I wonder of Kodak Brown Toner would work. Its essentially Liver of Sulfur
> and and sodium carbonate.
> ----
> Richard Knoppow
> Los Angeles,Ca.
> dickburk@ix.netcom.com
>
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