How to prevent spots on modern proof coins?
stevepk
Posts: 239 ✭✭✭
I went to a coin show today and was browsing through a selection of slabbed Franklin half dollar proofs in high grade. Many of the coins had milk spots despite being in PR65 through PR67 holders. In my opinion, a milk spot on a proof coin is ugly and should disqualify a coin for grade higher than PR63. I'm guessing these coins were spot-free when slabbed and later developed spots while in the holder.
How can I prevent spots from forming on modern proof coins? The coin I have in question is a 1961 PR67 Franklin half dollar in an NGC holder. As of now, it is completely spot-free and I would like to keep it that way. I live in Texas where there is high humidity. I've tried using silica gel packets in my safety deposit box, but they hardly last any time before becoming saturated, even when I use tightly sealed Ziplock bags.
Any advice would be appreciated.
How can I prevent spots from forming on modern proof coins? The coin I have in question is a 1961 PR67 Franklin half dollar in an NGC holder. As of now, it is completely spot-free and I would like to keep it that way. I live in Texas where there is high humidity. I've tried using silica gel packets in my safety deposit box, but they hardly last any time before becoming saturated, even when I use tightly sealed Ziplock bags.
Any advice would be appreciated.
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Comments
Hope this helps.
...I've seen mentioned on the forums that many recommend dipping in acetone before submitting to the TPG's as a preventative for spots in the future.