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Because
gold and silver are soft and malleable, for centuries, patterns
and images have been imposed on them by pressing a design
upon them. Minted coins are produced by stamping.
Hammering,
a variation on stamping, is when the precious metal is literally
beaten into the desired shape. Hammering precious has been
a metal working process for millennia. Eighteenth century
hammered silver bowls are created by hammering.
Smelting
and Casting - other traditional methods with shortcomings.
A
third method of forming objects from precious metals, and
one that is still in use today, is smelting and casting. Here
the metal is heated to where it becomes molten, and the liquefied
metal is then poured into a mold. When the metal has cooled
and hardened, the mold is removed leaving the desired shape.
But,
all these methods have their drawback s, which Electroforming
has overcome.
The jewelry or objects produced by stamping and hammering
can be only of a certain size. Decorativedetails cannot be
finely wrought without a great deal of extra finishing work,
such as chasing or engraving, filing and polishing.
Furthermore,
in smelting and casting, tiny bubbles of air often become
trapped in the liquefied metal and later produce "pit holes"
or imperfections. These mar the jewelry's surface. Also, to
produce anything of size, large amounts of the precious metal
are required to fill the mold, making the finished product
very expensive, heavy and uncomfortable to wear or move.
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