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$50 Bank Bag Of Moldy Cents. What To Do?

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jbuck's Avatar
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Dearborn's Avatar
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 Posted 06/23/2026  12:56 pm  Show Profile   Bookmark this reply Add Dearborn to your friends list Get a Link to this Reply
like the acetone soak method - following the polarity ladder, you can skip the water part seeing how they were in a moist bag for who knows how long.
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fortcollins's Avatar
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 Posted 06/23/2026  1:14 pm  Show Profile   Bookmark this reply Add fortcollins to your friends list Get a Link to this Reply
Wear an N95 or higher respirator around those things. You don't want any of that in your lungs. No coins are worth that. There's a reason why the Katrina and Harvey coins were pretty brutally acid tumble-washed by hazmat companies before being accepted by banks.

To be honest, I would throw them in the trash and not think twice about it.
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jbuck's Avatar
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 Posted 06/23/2026  2:38 pm  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply

Quote:
following the polarity ladder, you can skip the water part seeing how they were in a moist bag for who knows how long.
I would not. The water needs to be distilled and replaced to do its thing.
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Marv65's Avatar
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 Posted 06/23/2026  11:41 pm  Show Profile   Bookmark this reply Add Marv65 to your friends list Get a Link to this Reply

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Wear an N95 or higher respirator around those things

I used to own a woodshop and supplied all of my employees N95s for wood dust - but we still could smell farts and cigarette smoke through them - But they do work excellent for sawdust -
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Vector Ze's Avatar
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 Posted 06/24/2026  01:39 am  Show Profile   Check Vector Ze's eBay Listings Bookmark this reply Add Vector Ze to your friends list Get a Link to this Reply
Concur Marv65. A mask will do nothing to protect against acetone.
N95 masks do not filter gases; they are for particulate matter down to 0.3 micrometers.
An acetone molecule is about 0.0003 micrometers.
They will filter mold spores, which are 1 to 30 micrometers.
But in spite of the topic's title, I doubt mold is an issue here.
Edited by Vector Ze
06/24/2026 02:31 am
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fortcollins's Avatar
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 Posted 06/24/2026  09:10 am  Show Profile   Bookmark this reply Add fortcollins to your friends list Get a Link to this Reply
The N95 isn't for the acetone. It's for the mold spores.
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jbuck's Avatar
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 Posted 06/24/2026  10:53 am  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply
I have a surplus of N95 masks from the pandemic and they have been fantastic when doing yard-work. My allergies have only gotten worse with age.

That being said, I concur that they work great for blocking the bigger things, but many gaseous aromas still make it to my nostrils.
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-makecents-'s Avatar
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 Posted 06/24/2026  4:12 pm  Show Profile   Check -makecents-'s eBay Listings Bookmark this reply Add -makecents- to your friends list Get a Link to this Reply
A lot of interesting comments, thanks! The morning after I posted this, I put them in a 5 gallon bucket and used the snap on lid to seal them. After they dried, they all developed a green tint and I was very wary. I think I have a plan though and will report back after I try it with pics.
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 Posted 06/24/2026  4:36 pm  Show Profile   Bookmark this reply Add jbuck to your friends list Get a Link to this Reply

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After they dried, they all developed a green tint and I was very wary.


Quote:
I think I have a plan though and will report back after I try it with pics.
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Petespockets55's Avatar
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 Posted 06/24/2026  8:10 pm  Show Profile   Bookmark this reply Add Petespockets55 to your friends list Get a Link to this Reply
Just seeing this.
That much acetone might be an explosion/fire hazard.

How about soaking in hydrogen peroxide? It would not take long for it to do its job on the mold.

ps. What a fantastic Mom in Law you have.

pss. How did you dry the coins in a sealed container?
Words of encouragement are one of the major food groups.
We need to consume them regularly to thrive and grow.
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Marv65's Avatar
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 Posted 06/24/2026  9:25 pm  Show Profile   Bookmark this reply Add Marv65 to your friends list Get a Link to this Reply

Quote:
That much acetone might be an explosion/fire hazard.


Doesn't even take that much - just like gasoline - the acetone vapors can be ignited by a flame, even a cigarette. I've used acetone in my kitchen for years with no problem - I divorced my wife who couldn't stop her disgusting habit of smoking -
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-makecents-'s Avatar
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 Posted Yesterday   10:02 am  Show Profile   Check -makecents-'s eBay Listings Bookmark this reply Add -makecents- to your friends list Get a Link to this Reply

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ps. What a fantastic Mom in Law you have.
Yes she is, I'm very fortunate!


Quote:
pss. How did you dry the coins in a sealed container?
Yeah, I did not explain that very well.... I had opened the bank bag and spread them out on paper and with the AC running non stop, they dried overnight. When I checked them out the next morning, they had all developed a green, powdering coating that when you moved them you could see it plume. This made me a little nervous, so I scooped them up and sealed them in a 5 gallon bucket until I have time to mess with them again.
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Sap's Avatar
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 Posted Yesterday   5:45 pm  Show Profile   Bookmark this reply Add Sap to your friends list Get a Link to this Reply
It's almost certainly not actual "mold", or anything else biological. Mold doesn't like growing on copper. It's much more likely to be corrosion.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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