[Jewelry making - Article 00862] - Re: [Orchid] Heavy Platinum Welding

[John Donivan]

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>     getting full penetration in the weld without melting the edges of
>     the ring. 

    My, Neil, aren't we ambitious! There are two ways to weld anything.
    There's what you might call light welding, where you put two pieces
    together and just fuse them. Then there's what you need to do -
    what's I believe called fillet welding. It is theoretically possible
    to just fuse your sizing, but for a good weld the metal should be
    actually fluid. If you do that with your job there's a good chance
    the weight of it will just make it slump or even drip off. What you
    need to do is have a triangular shaped space in the joint - miter
    one or both sides, somewhat. Then fuse it at the bottom of that
    space - I'd fuse one side in place and then go to the other side, so
    nothing moves - tack welding. Then fill that space with metal from
    the bottom up, making sure that everything flows well as you go. In
    other words, don't expect to just melt the whole seam at once, just
    make a puddle and then fill it more and more with platinum rod. When
    you file it down, if there's some pits just use a tiny bur to clean
    them out and then re-fuse them. It's going to be tricky and hot..... 

http://www.donivanandmaggiora.com
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