Gold Coins Toning in PCGS Holders

djm

Is anybody having a problem with Gold Coins Toning in PCGS Holders? I have several modern gold commens that I made my self. I am noticing that after a few months the coins have the gold toning on them. They were not that way when I had them made.

PCGS States

<< <i>Our holders have been lab tested and will not discolor coins. We can not disclose any information regarding our holders. >>



Does anybody else see this? Does anybody know what causes this?

Thanks

keithdagen

djm,

Are these recent commems? One possible explanation is that the coins interacted with the environment when they were submitted in plastic flips in a way that caused them to tone after the slabbing. I had a bunch of nice moderns come back with some haze, then realized that the flips I was using, although advertised as inert, were causing the hazing.

MoneyLA

Please see the thread I started, also in this forum, "do rainbows grow?"
please describe your "toning." is it in fact toning or contamination from pvc or hazing or what?
this is fascinating. cheers, alan

djm

Keith:

The coins are 1994 World Cup and 1989 Congress. When I sent the coins in I did not take them out of the Mint Capusle. The coins were sent in at different times.


Alan:

It looks to me like the traditional gold toning. The darker gold color over the lighter gold of the coin.

cosmicdebris

I keep asking DH to answer why we can't use airtites for submitting coins. He has never answered me. It should stop this problem plus would better protect the coins during shipping.

benloe

I have a PR69Dcam Mt Rushmore that I made that is not as it was when they first slabbed it. It is
about a year in the slab now.

keithdagen

When I sent the coins in I did not take them out of the Mint Capusle. The coins were sent in at different times.

Odds are that the coins were handled a wee bit at the Mint, then. If you look at Heritage's auction archives for gold commems, you'll see that almost 100% of the MS-70's and about half of the 69's of the pre-mid-90's era are partially toned.

michael

for me i think when these coins were produced and then put into their holders at the mint with some surface contaminants on them ,,,the holders that almost hermetically seal these coins when they are "released" from their mint holders and subjected to air and out of their protective very fragile environment start to immediately react with the new environment and when sealed into their new slabbed holders still are reacting and this makes the coins look different

for me if you are going to submit any new mint products to any slabbing service you must take the coins out of their packaging and put into some inert marerial to let the coins breathe and see if they develop some other toning on them then they might have to be curated? before sent to any slabbing service also i think being very fragile they for the most part will turn no matter how you handle them

sincerely michael

Dimetime

DJM, I have a bunch of proof gold eagles. Many like you say are toning. More of an orangeish color. I've heard others describe this as mellowing. I don't know if the holder causes this or not. I've always wondered since the holders are sonically sealed, does this create any off-gassing of the plastic? We know when you heat plastic it gasses. Is it possible they "cold seal" the slabs? Anyone with comments on this?

MJCoin

I have owned several MS Gold Commemoratives that have toned while in my possession, and in my opinion all of them are more attractive and unique than as issued from the Mint. As a matter of fact, my single most favorite coin in my collection, regardless of value is a PCGS MS69 1988 Olympic $5 that has gold, orange, russet, blue and red toning. It is a $100.00 coin that I wouldn't sell for $1000.00!

mrcommem

I have had a few of my modern commemorative gold coins tone in their holders over about a three year period. I beleive it was due mostly to the polybads or flips I was using at the time. I usually submit coins in their original mint capsules or in cointains.