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Bronze Disease - Need Help

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Baltas's Avatar
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 Posted 02/20/2017  12:26 am  Show Profile   Bookmark this reply Add Baltas to your friends list Get a Link to this Reply
Thank you!

Both side better in hand. Still some brownish patina remain.
I made a small trick. After I finished cleaning there were holes, where the metal was shiny. So I dripping liver of sulfur, to earn that darker area.


Bronze-Disease---Need-Help

(If I am right the coin is "healthy" now, because I put water into the holes around a week ago, and nothing bad happend.)
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lrbguy's Avatar
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 Posted 02/20/2017  11:07 am  Show Profile   Bookmark this reply Add lrbguy to your friends list Get a Link to this Reply
Baltas, this is an excellent result. I am not familiar with "liver of sulfur" but it might just be interfering with the bonding of the chloride, substituting a sulphate or sulphide or sulphite ion. The chemistry is hairy (for me), but it looks good if this works. I prefer this to the use of carbonates. Can we see it 6 months from now? I still wouldn't wax it just yet, but if it's clean for a few months, then maybe.
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Victor's Avatar
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 Posted 02/20/2017  11:25 am  Show Profile   Check Victor's eBay Listings Bookmark this reply Add Victor to your friends list Get a Link to this Reply
"this is an excellent result. I am not familiar with "liver of sulfur" but it might just be interfering with the bonding of the chloride, substituting a sulphate or sulphide or sulphite ion."


He only used the liver of sulfur to darken the shiny bits, not treat the bronze dise ASE
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lrbguy's Avatar
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 Posted 02/20/2017  11:34 am  Show Profile   Bookmark this reply Add lrbguy to your friends list Get a Link to this Reply

Quote:
liver of sulfur to darken the shiny bits,



It helps to know what this stuff is and how it is used. As I said, I'm not familiar with it. What is it?
Valued Member
Baltas's Avatar
200 Posts
 Posted 02/20/2017  1:09 pm  Show Profile   Bookmark this reply Add Baltas to your friends list Get a Link to this Reply
Yes, I used that stuff only for coloring the naked parts.

Wikipedia:
"Liver of Sulfur is a poorly defined mixture of potassium sulfide, potassium polysulfide, potassium thiosulfate, and probably potassium bisulfide. Synonyms include hepar sulfuris, sulfur, sulfurated potash and sulfurated potassa.
Liver of sulfur is mainly used in metalworking to form a patina, turning copper alloys brown or black.
Typically liver of sulfur comes in a dry rock form which must be broken into smaller pieces and dissolved in hot water for use."

I do not like the color of this patina, but perfect if you want to correct small surfaces.
Of course I will post new pics a few months later.
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