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The Coin
Collecting Dictionary
Welcome to the Coin Collecting Dictionary. Here you will find the
terms, definitions, etc. that are unique to our
beloved hobby. Simply click on the letter
below to bring you to all the terms and
definitions for that letter.
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A
B
C
D
E
F G
H I J K L
M N
O
P Q R S
T U V
W X
Y Z
P
Planchet
A
planchet is a blank piece of metal that will be
stamped into a coin. It as the proper size
and weight of a finished coin but lacks the
design.
PVC
Poly-Vinyl Chloride, a somewhat active chemical
found in some types of plastic coin flips. PVC
will cause some coins to tone or turn green over
time. The effect is negligible on silver or gold
coins (and removable), but PVC has been known to
wreak havoc on copper, and to a lesser extent
nickel coins, especially if the coins have been
stored in warm or damp places over long periods
of time. (See "Flip"). A chemical (polyvinyl
chloride) used in come coin flips to keep the
plastic soft and pliable. PVC can break down and
leave slimy film on the coin. PVC flips were
largely discontinued in the early 1980s, when
its chemical reactivity was first realized.
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