Plastic slabs will protect the coin from mechanical damage, but they are
not air-tight. If you don't want/need to have it certified, I would put
it in an air-tite capsule. Ziplock bags are also supposed to be
chemically inert (after all, we put food in them).
I have kept red Indian Head cents away from sunlight in simple 2x2 holders
for over 30 years on the muggy east coast with no appreciable change in the
coins' color.
Although I have a few examples of what you are describing, I think
"red cents" are the most unstable and risky investments that I have
ever engaged.
I know they exist as I have some examples, but frankly, I'm scared of
them. I know that by my posession of them that some have survived,
although at a high price these days, but does anyone have a reasonably
priced true solution to their future preservation?
That is, without some unproved PCGS drivel?
Sure. Use Intercept Shileld boxes and inserts. They will protect the
coin for at least ten years and probably 15, and the list price is
about $15 for a slab box for ten coins. It's a two part system that
has a thin foil sheet of pure copper in the small inner capsules as
well as the box that holds the ten capsules. All slabs will fit in
these capsules. The copper is sacrificial and it intercepts not only
high humidity but sulfur and chemical gases in the storage
environment. Museums have used this Lucent technology for years. Every
coin in my collection has such protections. I'll hve to change them
out for fresh boxes in about tw more year, a real pain. It's worth the
trouble. There have been no color changes or spotting in eight years.
One caveat. If the coin, in a slab or not, has been recolored, the
surface has been made chemically active, and Intercept Shield will not
protect against color change in those instances.
Ira
________________
I agree with your observations. In a Florida atmosphere, I would expect a
lot of raw "red" coppers will develop carbon spots over the years. Some of
mine have, even though the color remains. My best preserved ones have been
half rolls of BU Lincolns back through the 1940's kept in screw-top tubes
for thirty years that still look like the day they were minted. But all
things considered, I too, would be reluctant to invest long term in BU red
copper.
Ira
Thanks everyone,
The intercept idea is a good one.
I have heard that NGC has a color guarantee when the coin is slabbed by
them. I'm 99% sure the coin is not recolored.
NGC has a color gurantee on copper coins slabbed recently in holders
which show a dark gray band on all sides of slab. Guarantee is ten
years from date of slabbing. I won't comment on whether the guarantee
is generally honored in the real world. PCGS has a grade and color
guarantee since their inception in 1986. I have used their guarantee
many times over the years and they have always come through. Nuff
said.
Ira
< NGC has a color gurantee on copper coins slabbed recently in
holders
which show a dark gray band on all sides of slab. Guarantee is ten
years from date of slabbing. I won't comment on whether the guarantee
is generally honored in the real world. PCGS has a grade and color
guarantee since their inception in 1986. I have used their guarantee
many times over the years and they have always come through. Nuff
said.
<
< Ira
How do they "come through" for you? Presumably they can't restore the
coin to its original red condition.
The chemicals that tone coins are in the air. There
are more of them in moist air than dry air. So you
have basically three options:
1. Dry your air by using dessicants, commerically
available from places like Brent Krueger.
2. Buy Intercept Shield products, or their equivalent.
These products have a protective layer that is designed
to stop contaminants from getting to the coin. I have
some, and they work great.
3. Remove the air by getting a vacuum sealing device.
That is correct. If a Red turns RB, they will either regrade at the
new designation and pay you the difference or buy it out right and pay
you the approx. current market value. Submitted chooses which one
he'll accept. Quite fair I think. PCGS has been badly hurt by the coin
doctors, paying out millions of dollars last year alone. That is just
the tip of the iceberg. Many coins which have "turned" are in safe
delist boxes or safes and the owners have no idea what has happened to
their once red coin. You can be sure. the heirs won't have a clue
either.
Ira
PCGS was set up at the Chicago International Coin Fair this past spring and
had two showcases full of coins they "had" to buy. They represented a
mixture of color changes, coins later discovered to be fakes, and a number
of toolings that the graders had failed to detect. Pretty sobering stuff,
that.
James
Just running down a detail here, but when they buy it from you at
"current market value" is that at the value of its former red
condition, or the current market value for your now deteriorated
brown?
Former condition. Not sure if it includes R/B to Brown too. I imagine so.