Author Topic: What’s the black coating?  (Read 75 times)

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Online Hitesh

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What’s the black coating?
« on: August 01, 2020, 01:51:50 PM »
Hi all - I have an Afghan silver that I’d like to clean if possible.
Not sure what the black deposits are. I’ve already tried soaking it in olive oil for an year or so to no avail. Would appreciate any help.

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Offline THCoins

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Re: What’s the black coating?
« Reply #1 on: August 01, 2020, 03:32:01 PM »
The black coating could be silver chloride. If so, you could try to dissolve this is a watery ammonia solution (keep well ventilated !)