Vermiculite Applications
Investment Casting
Dupré PK
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PK is a dust
suppressed “Fine
Grade”
Vermiculite
developed for
the investment
casing process
as a replacement
for Ceramic Fibre
insulation of
ceramic shells.
PK is fibre free
and harmless, it
has excellent
insulation
characteristics
and is used as
the final shell
back up coating
to provided
controlled
cooling of the
casting
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