The melt freezes quite fast and I just don't think there is time
for the heat to transfer to the metal with the lower melting point.
I Agree with Tony. The flask temperature when casting most metals ,
platinum, silver, 14k,18k,24k and others is quite cool in comparison
to the metal being cast. Full burnout temp to thoroughly
decontaminate your flask is 1350 oF . This is not hot enough to
affect any metal mentioned and certainly not hot enough to melt them.
When you cast,The casting temperature of the flask for any metal
other than platinum and a few rare metals will range between 650 oF (
very heavy) to 1350 for super fine filigree. So, as a result, your
flask casting temp for 14k gold will be somewhere around 1050 oF for
a medium size piece. In all cases, you should be able to cast around
any ( above mentioned) metal that has been correctly imbedded in the
wax pattern .
It must be noted that in the cases where a failure has been seen in
the process, it can most probably be attributed to the positioning of
the metal part within the wax pattern... more than likely , the part
could move easily within the invested flask after the wax was burned
out... and during the casting process, the metal part went where it
wasn't supposed to go. Daniel Grandi
We do casting and finishing for designers, jewelers, students and
people in the trade please call 401-461-7803 or email