Dipping MS and Proof coins

That makes sense. But I can live with the "experts" doing this. I wouldn't think of removing my kid's appendix, but I let an expert surgeon do it. Same thing. I don't see anything inconsistent with saying only the coin experts should be cleaning/dipping coins. Just my personal feeling on this...

 

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apparently you have not heard of the new Canadian technology with 99.999% gold .986 percent gold is not really pure in chemical terms it has a lot of room for toning

 

MS-70 will not tone mint red copper, but take a RB or a copper coin with some lite rub, and it will turn blue to purple. MS-70 is a no no for copper coins, I know as I have experimented so I could see what to look for.

 

Then let me ask it differently, why don't they advertise it? Get your coins expertly cleaned, dipped, graded and slabbed! So the rest of us know it. Or so those customers of theirs who infrequently submit might know it in advance? The stigma is out there, what other reason can there be?

 

i am not interested in 700 year old coins toning. i am asking you can pure gold tone ( read absolutely pure gold) if they manage to get to six 9 or seven 9 pure gold coins will they tone.

 

what about those people who sit on rooftops and shout that gold is inert and at room temperatures wont change in millions of years false propaganda?

 

I am not an expert on gold toning, and GDJMSP seems to really know his stuff, so I'll give him the benefit of the doubt.

But they even claimed that King Tut's mask/ gold coffin was as nice as the day it went in the ground. Then you hear about all the sunken treasure that was almost preserved by the salt water.... So I understand the questioning.

What I think is that gold alloyed with just about any metal is subject to tone/ tarnish whatever you want to call it. This is usually caused by the deposition of materials onto the surface of the coin/ jewlrey or whatever. Metallic ions are actually attracted to most other metals, and most other metals are also subject to a number of other destructive forces, where gold's is very limited.

If you read GDJMSP's statement about restoring luster he descibes the essence of luster on the surface of a coin, and how luster can be damaged, or revealed, but not "restored".

To answer the question to the best of my ability I would assume that the more pure the gold is, the less likely that it will tarnish; however there is no garuntee that it will not. There are even thought to be microscopic plant life that can slowly destroy the surface of gold which would give it a tarnished look.

So while a .9999 pure Maple Leaf/ Buffalo may be beautiful for a very long time there is always a chance of some tarnishing/ toning to take place however unlikely it may be. Furthermore; .0001 of that coin is unpure. What is that .0001 subject to, and how much will it affect the coin?????

So really there are multiple reasons why this is possible, but there could also be favorable conditions where something that is gold could be perserved in a pristine state for a very long time.

 

Probably kept as an open secret. Kinda like the Masons.

 

Although I'm sure some might rather think of it as the numismatic equivalent of pointing the middle finger at the uninformed public. But to each, their own, I guess...

 

Personally I think this is advantageous, and self serving for the TPG's since they are marketing their own graded coins. Not to mention as the value of the coin goes up, "the grading tier" or "service level" demands a higher price.

Although I have not actually ever been back charged for under-grading a coin. I have heard of this being a problem when the next grade up is a significant price jump.

 

tone

99.999 Gold would tone .001 % of coin .
rzage

 

Couldn't that be from the junk in the atmosphere , ie pollution getting on the coin , like the color of a smokers ceiling ?
rzage

 

I don't mean the chemicals & gasses in the air that cause oxidation , but like soot that darkens a building , the stuff that settles on it .
rzage