Hi. Thanks to everyone who has responded to my inquiry. I’ve never
heard of De-ox silver (thanks Alma and Ken). The company that does my
castings in not very forthcoming when I ask about the silver they
use, although they say they don’t use zinc. They don’t allow me to
provide my own silver. But the quality of their casting is REALLY
great, so I would hate to change companies.
why don't you try a short run in your tumbler with a mild abrasive
media? Then immediately rinse, patinate with liver of sulpher with
a bit of ammonia, and run again. Sometimes patina solutions don't
work well unless the silver is freshly cleaned and without
I’ve tried tumbling the castings in abrasive media before oxidizing,
but the media doesn’t get into the recessed areas, which are the
exactly the areas that I want to oxidize. It has been suggested that
I try sandblasting, and that is something to look into.
My liver of sulpher supply has expired, so I tried mixing ammonia
with a silver oxidizing solution that I got from a local jewellery
supply place. Sadly, it didn’t work. In any case, I was a bit leery
of mixing the two together. I really wish I had taken chemistry in
Thanks again for all your suggestions. This problem with the
castings not blackening seems to come and go as the years go by, so I
will hope that it goes away in the near future.