[Jewelry making - Article 00135] - Re: [Orchid] Marble stone as a Soldering Block?

[Dave Arens]

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Hi Gang,

    One of the best surfaces for soldering on at a jeweler's bench that
    I've found is the soft (often called silversmith's firebrick)
    firebrick. 

    These bricks are made of magnesia. They are soft enough to stick
    pins into & carve grooves & holes in with tweezers & other tools
    ordinarily found on the jewelers bench. They reflect heat very well &
    don't absorb much heat from the item being soldered. 

    When the surface gets grungy or too full of holes a flat surface can
    be restored by simply rubbing the brick on the sidewalk in a figure
    8 pattern. When new the bricks are aprox 21/2" high by 4 1/2" wide x
    9" long. Some jewelers supply's stock them & many builders suppliers
    either stock them or can refer you to someone that does. A look in
    your yellow pages for "Brickyards of Builders Supplies" may be
    helpful. Depending on where you get them they cost between $5.00 &
    $10.00 each. They last for years. 

Dave
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