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 Replies: 14 / Views: 256 |
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Pillar of the Community
United States
3120 Posts |
I pulled my Eisenhower dollars out from storage today as I haven't looked at them in a couple of years. All my coins are sitting in PCGS style slabs and then into a plastic bag for storage. The first picture shows what I mean by that. When they were put into this arrangement none of them had toning. I looked at them today and the one coin below is a sample of what some of them look like now. Any ideas? I don't mind the toning so much as I am wondering what caused it.    Edited by srs77
Yesterday 12:50 pm
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Pillar of the Community
 United States
6495 Posts |
Well, it's definitely attractive. The toning aficionados will approve.
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Pillar of the Community
United States
1087 Posts |
I'm jealous. Been waiting forever for that to happen to mine.
In fact I just ran to my Dansco stack and pulled out my Eisenhower BU & Proof set that have been on the shelf for about 15 year's to have a look.
Sadly only about 4 or 5 of mine have that golden toniing that I find very attractive.
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Bedrock of the Community
United States
18657 Posts |
TPG's love that kind of toning and will bump the coins grade for it.
Rainbow toning on silver coins is caused by chemical reactions between silver and environmental elements, particularly sulfur and oxygen, which create thin oxide layers that refract light into colorful patterns. humidity and lighting play a role in it as well as how a coin is stored
i'd say the one presented here would be MS65
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Valued Member
United States
470 Posts |
The cause may be the plastic bags intended to preserve the coins.
Plastic food storage bags can outgas chemicals like plasticizers, potentially reacting with the coins' surfaces.
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Moderator
 United States
188122 Posts |
The toning is attractive, in my humble opinion.
Keep in mind that these slabs are not air tight. The plastic bags are not air tight. Air will migrate in and out in over long periods of time.
Where did you store them?
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Pillar of the Community
 United States
3120 Posts |
Thanks everybody. I agree the toning is very attractive. Better in hand than in my photos. JBuck, I had them stored in a cabinet with humidity controlled (supposedly) atmosphere. I'll post some more pictures of other coins. Some of them looked remarkable when I took them all out. I had Ike's, presidential and Sacagawea dollars along with Anthony dollars. |
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Moderator
United States
188122 Posts |
I suspect the cabinet materials contributed to the toning.
Cooking and smoking are other factors to consider, if those activities apply to the location.
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Bedrock of the Community
United States
19144 Posts |
Were these pieces originally pulled from uncirculated mint sets?
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Pillar of the Community
United States
3120 Posts |
Quote:
Were these pieces originally pulled from uncirculated mint sets? A few in my collection have been but 95% from bank or other places. |
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Moderator
Australia
16816 Posts |
It's impossible for us to know for certain what might have caused the toning; there's too many variables. Some possibilities are: - The slab itself. These aren't TPG slabs but Coin World lookalikes. - The label you've printed to go in the slab; either the paper or the ink could be issues. - The plastic bag you've put the slabs in. - The cabinet. "Humidity controlled" often means they actually pump slightly-humid air into it; some safes and storage boxes do this as they're designed to preserve paper documents, and documents are best preserved slightly moist rather than fully desiccated. - Was any silica gel or other desiccant present? 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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Pillar of the Community
United States
3637 Posts |
The cardboard inserts in the holders have direct contact with the coins, and would also be very likely culprits. The wood used in the cabinet can also react with the coins. Particle board reacts more than natural wood. (I remember some of the old timers in the 1960s placing coins on edge in the corners of wooden cigar boxes to "help" the coins tone over old cleanings.) At least the toning looks good right now. Pretty much anything except pure glass containers pressurized with Argon gas will react over time.
Edited by fortcollins
Yesterday 10:14 pm
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Bedrock of the Community
United States
19942 Posts |
Only one of them toned? What happened? They were exposed to toning gasses. In this case I'd say LUCKY YOU! Personally, I'd try to repeat it on all of them, white Ike's are a bit boring to me. LOL
You mentioned "stored in a bag". The one in the picture is weak, those bags suck. Recommend the super heavy poly bags for coins and, if you don't want your coins to tone, a sacrificial copper cent and a desiccant pack. Increase layers, those cheap bags are fine just to protect the slab from damage, but they should be put into a more robust bag for storage.
Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Bedrock of the Community
United States
19942 Posts |
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Plastic food storage bags can outgas chemicals like plasticizers Not in America they don't. Polyethylene storage bags do not contain plasticizers nor do they outgas chemicals. They are rated for direct food contact because there are no residual monomers nor plasticizers contained in the polymer. |
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Pillar of the Community
United States
3120 Posts |
Quote:
The cardboard inserts in the holders have direct contact with the coins, and would also be very likely culprits. The wood used in the cabinet can also react with the coins. The inserts are a pvc free rubber or Vinyl. Quote:
Only one of them toned? What happened? They were exposed to toning gasses. In this case I'd say LUCKY YOU! Personally, I'd try to repeat it on all of them, white Ike's are a bit boring to me. LOL No, most all have toned. Some are totally gold on obverse and reverse. I am guessing it's the cabinet it's in. The toning is rather nice on those that got toned. I'm going to try to take some pictures of those that toned and I'll post them in the parent forum topic for modern coins. |
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Replies: 14 / Views: 256 |
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Posted Yesterday 1:16 pm
