[Jewelry making - Article 00941] - Re: [Orchid] Magnesia soldering block

[Margaret Malm]

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>         To be real honest, I don't know the exact chemical makeup of
>     the bricks. I get them at a local brickyard. There, they're called
>     'silversmiths bricks'. They're 2 1/2" x 4 1/2" x 9" & weigh 1# 14
>     oz. They're soft enough that pins can be pushed in with your
>     fingers. While they're smooth, they have many holes that may be the
>     result of small air bubbles trapped when the bricks were cast. 

    Judging by the above description, it sounds like a fire brick; which
    can be cleaned by sanding, or rubbing on concrete, etc. 

margaret


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