Posted by joewizard on January 04, 19100 at 20:35:03:
In Reply to: Re: alloying posted by DanW on January 04, 19100 at 18:51:49:
Looking forward to seeing what you find. I've been looking too, but other than a list of percentages of what metals to add, not a lot of luck so far.
I did find one recipe. Comes from a book printed in the 1800's.
Anyone have an opinion on this procedure, and if this will make a decent casting alloy? It goes as follows, copied word for word:
-Oroide, or Artificial Gold-
This material is manufactured largely in the United States into imitation jewelry and other articles, scarcely distinguishable from gold, except by the inferior gravity; and it is a matter of surprise to almost anyone to learn that it does not contain a single grain of the precious metal. It is made by taking 100 parts of pure copper, 17 of pure tin, 6 of magnesia, 9 of tartar of commerce, 3.6 of sal-ammoniac, and 1.6 of unslaked lime. The copper is first melted, and the other substances ( excepting the tin ) added, a little at a time, and the whole well stirred for 30 minutes, so as to produce a prefect mixture, when the tin is thrown in and stirred round until melted. The crucible is then covered, and the fusion kept up for 25 minutes, and the scum taken off, when the substance is ready for use. It is malleable and ductile, and can be worked in any form, even into leaves like gold. The alloy may also be made by substituting granulated zinc for tin, but it will not retain it's brilliancy so long as when tin is employed. "
Im not sure exactly what todays equivalent of 'magnesia' and 'tartar of commerce' and 'unslaked lime' are. Sal-ammoniac is ammonium chloride.
The components are some kind of flux, no doubt. Maybe a more modern pre-mixed flux could be used?