[Jewelry making - Article 00363] - Re: [Orchid] CAD/CAM grown model woes

[John Donivan]

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>     Got a nice grown model back. Gave it to my caster, a very
>     knowledgeable whlosesale jeweler I have worked with for 15 years 

    Richard, I don't know much about the growing side, and those
    materials, but someone gave us a handful of grown pieces to cast a
    couple of months ago. What a nighmare it was, and we never got
    anything you'd call a clean casting. I had suspicions, so I put a
    piece in water over the weekend and discovered that it was partially
    soluble in water. It was also quite brittle. This material was a
    pretty kind of teal color. According to the client, who's the CNC
    guy, this was the latest material that solved all the casting
    problems of previous ones and it should cast just like wax and yadda
    yadda. To me, when you factor in that he's talking $150/model
    minimum - that's just machine time, and then throwing in $45 for an
    RTV mold, well --- never again, for me. I paid $85 for a shared prong
    wax that was milled, which is way more like it. I'd likely machine
    the outside and then do benchtime to get the stuff that RP is needed
    for, if anything. 

http://www.donivanandmaggiora.com
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