Editor's note: This is the third part of a multi-part series
prepared by Rita Laws for Coin World's February 2015 monthly
issue about the world's first mint-colored coin.
As technology advances, we may see totally new methods of coloring,
but for now, there are three basic types.
The simplest and least expensive involves the use of a colorful
appliqué that is adhered to the surface of the coin. Palau, Malawi,
Zambia, and Liberia have issued appliqué coins, among others. Some
have an artistic look while others are made to resemble miniature
photographs. A few call their appliqués prismatic, but collectors
often refer to the pieces as hologram coins.
The next type involves coloring a surface by way of a computerized
process using ink or paint. The British Virgin Islands, Isle of Man,
Canada, and Australia are just a few of the nations issuing this type.
The Australian mints call it “colour printing.” The effect is not as
flat-looking as an appliqué, and most collectors prefer it to coins
However, the third type is the most popular with collectors. The
final process type is also the most labor-intensive and expensive
process. The resulting colored coins are called enameled coins.
Most people think of enameling as the ancient process of filling
cells with colored silica and firing the items, adding multiple layers
to achieve a smooth shiny surface. However, mint-enameled coins are
more likely to be made with a cold enamel process involving one or
more layers of paint. As with the Cuban process, cells on the surface
of the coin are filled with different colors. The results are
brighter, leaving designs with more detail and more of a “wow” factor.
They resemble miniature oil paintings.
Today, this enameled look can be found on coins issued by
Afghanistan, China, Canada, France, and Bulgaria, among others. The
last three countries have described some of their enameled issues as “hand-enameled.”
When the coloring is translucent, the effect is that of stained
glass. Canada has issued several translucent enameled commemorative
coins using a process of its own invention.
Keep reading this series:
Which coin is the world’s first mint-colored coin?
Colorful fantasy coins pave way for official coins
is the future for colorful world coins?
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