[Jewelry making - Article 00586] - Re: [Orchid] Soldering in a kiln

[Bethkatz]

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Rodney,

    In order to solder in a kiln, you need an inert atmosphere.  In
    other  word, no oxygen.  In commercial applications there is a
    special atmosphere  created for soldering. The pieces can be
    soldered by using a belt system,  where the belt moves the objects
    from one temperature to another, then completes  the soldering
    action and passes it on to mass finishing, taking all the steps to 
    make the pieces as a final product.  The pieces can also be soldered
    on an  individual basis with a heat proof mold being utilized to
    hold the parts in  place while they are being transported to/from
    the kiln.  They are taken  out in one batch and then mass finished. 
    Keep in mind, the commercial  people have the correct atmosphere to
    make the solder melt and flow, in other  words..... not a process
    available to anyone without this type of  equipment. You can solder
    with paste solder very easily by using a torch.  I  prefer to use an
    acetylene/air setup, but it can be successfully soldered with  paste
    solder using oxygen/propane or butane.  I find it way too hot to use
     an acetylene/oxygen for a small piece; great chance of melting the
    metal. It is important that you pick the correct melt and flow
    temperature  (formula) for the items you are going to solder with
    the paste solder.  In  silver, many different formulas give you an
    opportunity to select the proper  temperature for the object(s) you
    are wishing to solder and are  available in a larger range of
    formulas than the sheet or wire. 

Beth Katz
http://www.myuniquesolutions.com
Paste and Powder Solder for Jewelers and Metalsmiths

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