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 Replies: 6 / Views: 2,118 |
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Bedrock of the Community
Australia
21788 Posts |
Some years ago I had stored some metallic sodium metal in a chemical laboratory.
Some of us on the CCF may know that this stuff is very highly reactive, so much so, that is very dangerous. It normally stored in an airtight glass jar, under kerosene, which must completely cover it.
Quite a few countries over the years have issued coins in these metals, but not sodium! For instance, I have a rather nice cash coin in zinc of Annam (Vietnam) that was issued in about 1750. I think that is amazing that a zinc coin should have lasted that long. So the kerosene idea has extracted a small amount of serendipity from me.
European countries during WW2 also issued zinc coins, and I also have an Unc. square 5 Cents from the Netherlands of 1943, also in zinc, a Chinese cash coin in iron, and some Malayan tin pitis coins.
Which brings me to the heading of this string.
Being a straight chain hydrocarbon, similar to kerosene, I rub a film of paraffin wax over coins made of zinc iron and tin.
Do any of us in the CCF a better idea than mine to preserve such coins?
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Pillar of the Community
Philippines
1156 Posts |
I think youve got it down pat, except that paraffin wax is highly flamable. An alternative, I'd use vacuumed plastic pouches packed by a 3rd party, instead of the ordinary 2x2, no air no corrosion  |
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Pillar of the Community
United States
672 Posts |
I like the paraffin idea, but the SC Hydrocarbon seems like it would work too.
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Pillar of the Community
United States
1256 Posts |
No smoking :)
I have a nitrogen tank from my pressure rocket days and have been considering how to use it for long term coin storage.
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Bedrock of the Community
United States
20753 Posts |
As already noted no air, no moisture, no problems. I suggest you simply put your coins in a 2x2 and seal the edges with clear tape, not staples.
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Bedrock of the Community
United States
20753 Posts |
Of course if you really, really want them to last forever, do this: Quote: |
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Bedrock of the Community
 Australia
21788 Posts |
I have a gold plated antoninianus of Postumus in good EF. Not worth any more, but it is going to outlast all of the other roman silver coins that I have
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Replies: 6 / Views: 2,118 |
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Posted 11/12/2010 07:28 am
