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Firestain on silve

Richard wrote:

The problem with deoxidised silver is that obviously they have

been formed in an inert atmosphere, probably they were heated
using argon as a shield. But once they are heated again the
firestain returns. I have tried mechanically removing firestain
with abrasives, but this tends to remove detail as well


I believe deoxidized silver is a special .925 alloy that resists
cupric oxides. I use it exclusively for casting and experience
no firescale even after repeated solderings. It casts bright and
reduces porosity also. The alloy I use comes from PMR in New
York, I believe they hold the patent for the alloy.

Thanks for the info on deplating.

Kenneth Gastineau