Brandeil (is that your name?)
You can get PMC info from Rio Grande, they are the only distributors in the
US so far. Also I have the little booklet and would send you a copy if you
In short, PMC is a clay substance with either fine gold or fine silver as the
metal. The composition is a guarded secret by the manufacturers
(Japanese)(Mitsubishi). You mold the clay and then fire it in a tedious
process taking about 4 hours. It shrinks approx 50% ( the mysterious
contents) leaving fine silver or gold. So far, it has mixed results.
It was just released to the public this year, but last year agroup of highly
asteemed metal artists got to “play” with it at no expense to them. They
have mixed feelings. The shrinkage factor means it is not as reliable as
casting, the cracking factor is also an issue. It is extremely porous and
cannot be soldered. So you have to use your imagination to build in findings.
The fired metal is 80% as dense as conventional sheet or wire. It is not
recommended for applications requiring high tensile strength such as
findings, chains and settings.
You can form it by making sheets, wire, extruding through presses, press
into molds, just like clay. It must be kept moist and pliable.
It can be refired, but subsequent firings in our class showed additional
shrinkage. You can implant things into the material (items must withstand
kiln temps of 1650 for silver).
Finished pieces can be burnished or tumbled, polishing will put rouge in the
I am not an expert, but more people are becoming familiar with PMC through
classes. Candy is going to take the PMC class in Tucson through RIO.
Let me know if I can help anymore.