Milk spots on SAEs
stev32k
Posts: 2,098 ✭✭✭
Does anyone know what causes them, and do they occur on some dates more than others? Maybe more importantly is there anything that can be done to prevent them?
I have several high grade SAEs and have not seen any milk spots, but some of the recent threads have me wondering if it's just a matter of time before they show up. I was planning to buy more maybe MS69 and MS 70, but now I don't know?
I have several high grade SAEs and have not seen any milk spots, but some of the recent threads have me wondering if it's just a matter of time before they show up. I was planning to buy more maybe MS69 and MS 70, but now I don't know?
Who is General Failure, and why is he reading my hard drive?
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Comments
I don't know the chemistry of MS70 and why that would prevent milkspots on PROOF Kennedys, but sounds like at least something to consider.
Do the milk spots appear on the Proofs in the mint box or just when they are slabbed?
Sorry..I am confused on this
RJ
<< <i>what am I missing here?
Do the milk spots appear on the Proofs in the mint box or just when they are slabbed?
Sorry..I am confused on this >>
That may be part of what the scientists are trying to figure out. If it's the mint box, PCGS may want to stop slabbing these coins unless they can find a workaround to the problem, or else they could be eating a lot of buybacks.
Do collectors have any spotted ones in their mint boxes. I was under the impression that maybe it was only after they were slabbed that the problem started. I have about 6 in mint boxes and they have no spots or milkyness to them.
RJ
<< <i>I don't know if this applies to SAE milkspots, but I thought I recalled a post from Russ about using MS70 to dip 1964 PROOF Kennedys prior to sending them in for grading and having good success avoiding the formation of milkspots that way. >>
I don't use MS70, but I do dip to remove hidden surface contaminants on every proof coin I submit. No dipped example has ever developed milk spots after grading. Plenty of undipped examples have.
Russ, NCNE
Dan
First Place Winner of the 2005 Rampage design contest!
most people would polish them away gently on silver that is used in normal activities.
or
the silver should be left in the open air to dry.
pcgs slabs could stop that process.
this has to do with silver plating though.
researched via google.
i wonder if anyone will guess the cause before the "scientist" does.
also, did anyone examine the spot in more detail?
is it dry? greasy?
Jerry
First Place Winner of the 2005 Rampage design contest!
The Ludlow Brilliant Collection (1938-64)
<< <i>
<< <i>I don't know if this applies to SAE milkspots, but I thought I recalled a post from Russ about using MS70 to dip 1964 PROOF Kennedys prior to sending them in for grading and having good success avoiding the formation of milkspots that way. >>
I don't use MS70, but I do dip to remove hidden surface contaminants on every proof coin I submit. No dipped example has ever developed milk spots after grading. Plenty of undipped examples have.
Russ, NCNE >>
Russ, sorry about the mis-quote (MS70), I was pretty sure I recalled some dip occuring that helped prevent the milkspotting problem.
Herb
1991
1995
1996
1999
2000
2001
2002
2003
The most recent years are the most discouraging to me for some reason.
I found (3) PR69DC gals, that exhibit "milk spots."
None of the older, blue label slabs, were affected.
The (3) gals that are spotted were certified within the past 12 months. The years are: 1991, 1998, and 2004.
The '98 is by far, the worst of the three.
The '04 is barely spotted, and I would not have noticed the spots, were I not looking closely.
I'm not gonna bother sending them down, tho. I guess I shud be happy that the 93, 94, and 95 gals are just fine.
I will set these (3) aside, and watch them to see if the spotting will worsen?
My 2c...
Thank you
Rob