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- - gold buffalos in PVC sheets (http://goldismoney.info/forums/showthread.php?t=45949)

RossL | 07-14-2006 10:10 PM
gold buffalos in PVC sheets The US Mint has admitted that the 1 oz gold Buffalos shipped in plastic sheets do contain PVC. They originally said the plastic was "inert" or something like that. http://www.coinworld.com/news/cwhl.asp?uID=&hlID=2 don't believe that BS from the mint. PVC turns coins green and deposits a slimy film. I don't know if it will do anything to 24K gold ... Actually, I've never heard of anyone storing gold coins in a sandwich bag, but I've seen a lot of silver and nickel coins with the green filmy coating after several years in a baggy. I advise to get rid of the PVC plastic and get some air-tites. The proofs are not in PVC.

graspAU | 07-14-2006 11:05 PM
Re: gold buffalos in PVC sheets Quote:
Originally Posted by RossL (Post 299806) The US Mint has admitted that the 1 oz gold Buffalos shipped in plastic sheets do contain PVC. They originally said the plastic was "inert" or something like that. http://www.coinworld.com/news/cwhl.asp?uID=&hlID=2 don't believe that BS from the mint. PVC turns coins green and deposits a slimy film. I don't know if it will do anything to 24K gold ... Actually, I've never heard of anyone storing gold coins in a sandwich bag, but I've seen a lot of silver and nickel coins with the green filmy coating after several years in a baggy. I advise to get rid of the PVC plastic and get some air-tites. The proofs are not in PVC.
Thanks. I had already done this but for different reasons. Two of my bullion coins the plastic sheet was already broken at the edge. Good info. The mint should ship them in something better like the austrailians.

TomD | 07-15-2006 01:13 PM
Re: gold buffalos in PVC sheets Gold, which is chemically inert, reacting with poly vinyl chloride, which is also chemically inert? PVC doesn't react with much, which is why you bury pipe made with it and run various solutions through it for many decades and expect it to be unchanged. Baggies aren't PVC. Oh well, this sounds like an excellent excuse to take my GB Buffalos out of those nasty plastic packs like I wanted to do anyway.

Au_Ag | 07-15-2006 02:06 PM
Re: gold buffalos in PVC sheets Quote:
Originally Posted by TomD (Post 300176) Gold, which is chemically inert, reacting with poly vinyl chloride, which is also chemically inert?
I don't know if it was PVC or not, but I had some Krands that were put back in plastic sleeves for about 15 years. They got a minor funky haze on them. Cleaned off relatively easily with a soft cloth and midl soap and water. But why bother? take em out of something that is likely to be a hassle.

RossL | 07-15-2006 04:30 PM
Re: gold buffalos in PVC sheets Quote:
Originally Posted by TomD (Post 300176) Gold, which is chemically inert, reacting with poly vinyl chloride, which is also chemically inert? PVC doesn't react with much, which is why you bury pipe made with it and run various solutions through it for many decades and expect it to be unchanged.
After doing a little more research, I found it is not the PVC that damages the coins, it is the plasticizers that make the PVC soft and pliable. Your PVC drain pipe doesn't have the plasticizers.

TomD | 07-15-2006 06:34 PM
Re: gold buffalos in PVC sheets Quote:
Originally Posted by RossL (Post 300346) After doing a little more research, I found it is not the PVC that damages the coins, it is the plasticizers that make the PVC soft and pliable. Your PVC drain pipe doesn't have the plasticizers.
I'll buy that. Incidentally, beautiful cat, yours?

RossL | 07-15-2006 07:08 PM
Re: gold buffalos in PVC sheets Quote:
Originally Posted by TomD (Post 300415) I'll buy that. Incidentally, beautiful cat, yours?
Yes. pics in the pet pic thread: http://goldismoney.info/forums/showthread.php?t=31083

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