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FYI
Bronze Casting in a nutshell |
The
process of creating a sculpture starts with the construction of
an armature
(or skeleton) to support the piece. This is sometimes filled out
with Styrofoam wire or plaster to create a stable framework for
the sculpture.
Modeling
compound or clay is then laid on this foundation, and the piece
is "roughed out". Detail is finally added, and the mold
is ready to be made.
Often,
as an interim step, a waste mold is created directly from the
clay in either hydro-cal or plaster, in this way the piece can
be refined or mistakes corrected before the final mold is made.
From
here a silicon mold is made from rubber and plaster. Melted wax
is then poured into the mold and a "positive" image
is obtained. The wax image is then dipped multiple times in a
ceramic "slurry" until a hard shell is formed. The wax
is then burned out in an oven, and a hollowed-out or "negative"
image is created.
Bronze
ingots are melted down and the melted bronze is then poured into
the cavity. When the metal has sufficiently cooled, the bronze
sculpture is broken out, chased, cleaned, a patina of choice is
applied. the sculpture is then mounted on its base and,
Voila...........
This
method is called 'Cire Perdue' or the lost wax process and is
3,000 years old.
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