[Jewelry making - Article 00362] - Re: [Orchid] Article: Minimal Metalsmithing

[R . E . Rourke]

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>     Tim McCreight finds that PMC has the density of cast fine silver.

    This statement, and I will be checking with Tim, to see if he said
    it, is a physics, and particulate impossibility. plain, simple
    scienctific fact. 

    PMC has nowhere near the density as fine silver. Even after firing,
    the particles do not crystallise and therefore, it is not only a
    structural impossibility, but a minerological one. not to mention
    the fact that to gain the kind of density pure silver has, one would
    need astounding pressure and heat to drive off the binder, and
    hypersinter it into something with even 2/3rd's the strength of.
    999Ag. Oh and .999 Ag can come into contact with Al without problems.
    PMC cannot.. it is clay and more suited for potters then, than
    jewelers.. 

R. E. Rourke
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