<< <i><< From the ASE's I have seen and have researched, milkspots have a seeded particle in the center which reacts with the coin surface causing the surrounding spot to develop. What causes or how this particle appears on the coin surface is yet undetermined.>.
That little center spot would be responsible for what is called nucleation or a starting nucleus for the milk spot. It could arise from almost anything, as its likely the air around the coin presses is hardly particle free. >>
That may be true, but it makes you wonder why milkspots are generally a ASE occurence. Also when you get coins back from grading with debris inside the slab it sure makes you wonder how much care is being given to the slabbing eviorment to ensure no contamination is transfered to the coin which can cause degradation.
Never teach a pig to sing. You'll waste your time and annoy the pig
<< <i>That may be true, but it makes you wonder why milkspots are generally a ASE occurence. >>
As explained in an earlier thread, the sheer volume of coins struck probably means that a little less care is taken in the planchet preparation for ASE's than it would be for short run commems like the Buffalo dollar and the SF old mint coins. They are hardly rare so if a 2007 bullion ASE spots just go find another.
Many people buying slabbed ASE's are not members of TPGS's and are buying the coin under the assumption the coin is what the insert says it is and what TPGS's guarantee it is.
Never teach a pig to sing. You'll waste your time and annoy the pig
But why should PCGS guarantee against milk spots? Its not something that is under their control. I feel sorry for those who pay big $$ for them and the coin later turns. Its not like PCGS did anything that caused the problem or that they should have a crystal ball to tell which will spot and which will not. If anything their beef is with the mint.
For the same reason they would not slab ASE's 70. PCGS guarantees the grade of a coin that is in one of their slabs. That is one of the reasons PCGS slabbed coins sell for a premium.
Never teach a pig to sing. You'll waste your time and annoy the pig
There is little point in us discussing it as we can't change it. If I was PCGS I would be dipping anything that is going into a 70 holder whether it be pre-2006W or not. Also if it was me, I would not guarantee against something that is beyond my control, but that is me. Apparently they must be coming out ahead $$$wise or they wouldn't make such a guarantee.
mighty tough to guard against, even in 'perfect' conditions per se. i know.
"government is not reason, it is not eloquence-it is a force! like fire, it is a dangerous servant and a fearful master; never for a moment should it be left to irresponsible action." George Washington
Bajjerfan, I believe a spectrographic analysis or atomic absorption would show the elements of the spots as well as the 'seed' nucleus. Once that is determined, I believe a path to resolution could be worked... I think even the Mint would listen to a scientific analysis and recommendation. Cheers, RickO
Comments
<< <i><< From the ASE's I have seen and have researched, milkspots have a seeded particle in the center which reacts with the coin surface causing the surrounding spot to develop. What causes or how this particle appears on the coin surface is yet undetermined.>.
That little center spot would be responsible for what is called nucleation or a starting nucleus for the milk spot. It could arise from almost anything, as its likely the air around the coin presses is hardly particle free. >>
That may be true, but it makes you wonder why milkspots are generally a ASE occurence. Also when you get coins back from grading with debris inside the slab it sure makes you wonder how much care is being given to the slabbing eviorment to ensure no contamination is transfered to the coin which can cause degradation.
<< <i>That may be true, but it makes you wonder why milkspots are generally a ASE occurence. >>
As explained in an earlier thread, the sheer volume of coins struck probably means that a little less care is taken in the planchet preparation for ASE's than it would be for short run commems like the Buffalo dollar and the SF old mint coins. They are hardly rare so if a 2007 bullion ASE spots just go find another.
<< <i>wait til the milk hits the 70's. They wont be able to give them away on ebay >>
Mite be a good time to grab a couple on the cheap.
mighty tough to guard against, even in 'perfect' conditions per se. i know.
Can I buy it retail somewhere?
Okay easy enough, I have used it to remove PVC, now I will use it on ASE's.