Toned Platinum Coins/Bullion - Coin Community Forum

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Author	Replies: 4 / Views: 1,632
VetStudent Valued Member United States 306 Posts	Posted 03/04/2012 11:51 am I know that platinum is not supposed to tone, but that it doesn't mean that it can't. Does anybody own any platinum that has a desirable toning? Please post pics if you do and would like to share! Report this Post to the Staff

Ed_B Pillar of the Community United States 4008 Posts	Posted 03/06/2012 12:10 am Unlike Ag, Pt does not react with O2 except under extreme conditions that are unlikely to be found outside a lab... oxygen furnace + 2500-3000F, etc. Pt is definitely a "noble metal" and resists forming compounds except in extreme chemical and physical environments. It is unlikely that anyone has "toned" Pt just laying around. Dirty or stained, perhaps, but not toned as we tend to think of coins toning. Report this Post to the Staff
biokemist6 Bedrock of the Community United States 12437 Posts	Posted 03/06/2012 12:50 am Platinum will not tone under normal conditions, you would have to subject it to some pretty extreme environments to even have a chance of toning it. Report this Post to the Staff
SilverBug Pillar of the Community Canada 862 Posts	Posted 03/06/2012 01:06 am it could be just dirt on the pt. here is what I heard that you can do to platinum or gold: you burn it. after the dirty stuff burn out, your platinum or gold will shine like new Report this Post to the Staff
Ed_B Pillar of the Community United States 4008 Posts	Posted 03/06/2012 6:45 pm Yes, you could do that. A natural gas and air flame, such as from a Bunsen burner, should be good for that. That should "cook off" just about any dirt or oil on the coin and leave it very clean. This would have to be done VERY carefully, though, so as to not damage the coin by careless handling. Pt coins tend to be expensive items, so it would probably be best to minimize handling and cleaning. Perhaps a very gentle rub with a cotton ball and some isopropanol would be sufficient for removing any dirt or oil from the coin without causing damage to it. Report this Post to the Staff
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