Palladium White Gold

To all members, I know this thread has died out, but I thought I
would ask my question one more time, as I got no response when I
did so last week. Someone out there must have some experience in
casting this material… I ordered some casting grain to try this
mixture, and received a “fact sheet” warning me not to use a
carbon crucible with palladium white gold. My questions aRe: #1)
Is this a fact that a carbon crucible cannot be used? And if
so, then— #2) Can I get a “non-carbon” crucible for a Jelrus
casting machine, either a J-100 or the I-3A? Maybe someone can
direct me to someone who can answer these questions? Thanks for
your help. Mike