|
Storing Your Coin
Collection
Air. Exposure to the
air oxidizes metal, changing its color. This does not reduce the value of your coins. It
is advisable though, if you are storing your coins for a long period of time, you store
them in a controlled environment.
Environment. A relatively constant,
moderate temperature and low humidity are preferable for long term storage of numismatic
collectibles. Placing packets of silica gel in coin storage areas helps control
atmospheric moisture.
Holders. Several types of
"containers" for coins are available. Most anything will do for coins with
little numismatic value, while nearly airtight holders made of inert materials are a good
idea for valuable coins.
Many modern numismatic coins come encapsulated to protect
the coin from damage. Do not remove the coin from its capsule.
Bags, jars and boxes are adequate for pocket change and
circulated bullion coins.
Paper envelopes of various sizes are sometimes used for one
or more coins. Be sure to use envelopes made explicitly for holding coins, or your coins
may change color (tone) over time due to reaction with sulfur or other chemicals present
in the paper.
Various brands of folders and albums are sold for series
and type sets. When properly used, they offer some protection from wear and handling. Over
several years coins may tone due to reaction with sulfur or other chemicals present, and
they are therefore not a good choice for long term storage of higher grade coins.
Plastic flips are available in various materials.
"Soft" flips are made from polyvinyl chloride (PVC) which decomposes over time
with disastrous results for coins. They are therefore not suitable for long term storage.
Mylar and acetate flips do not contain PVC. However, they are hard (may scratch the coin
if not inserted and removed carefully) and brittle. While not airtight, they are
reasonable choices for moderate value coins that will be "left alone" for
multiple years but less so for coins to be shipped or that will be removed and reinserted.
Mylar-line cardboard, often called "2x2s" but
also available in other sizes, are similar to plastic flips. A coin is placed between the
two halves, which are then stapled together (some brands contain an adhesive).
Tubes are plastic containers designed to hold a number of
the same size coins. They are fine for bulk storage of circulated coins and can be used
for higher grade coins, provided the coins do not move. A disadvantage is that the coins
cannot be viewed without being removed from the tube.
Hard plastic holders are preferable for more valuable
coins. They are not known to contain any materials that harm coins and offer good
protection against scratches and other physical damage. They are available for individual
and small sets of coins.
"Slabs" are sonically sealed hard plastic holders
for individual coins. They offer good (though still not perfect) protection, but because
of the expense of having a coin slabbed, they are generally suitable only for more
valuable coins.
| 
