[Jewelry making - Article 01151] - Re: [Orchid] Question About Borax Flux

[James Binnion]

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Hi Greg,

>     I have been using 20 Mule Team Borax mixed with water as my only
>     soldering flux for over 25 years and have never had a problem with
>     it. I do use the finer gra.de commercial Borax as my flux for
>     casting. 

    It is not that borax alone will not work, it was used for ages as the
    only soldering flux and is of course still used today as you point
    out. It is just that it has a fairly high melting point at 1367F.
    Most commercial soldering fluxes melt at lower temperatures (about
    1100F) and they offer a greater range of protection by having more
    fluxing ability, being more fluid and having a reduced surface
    tension. 

Jim

James Binnion
jbin AT mokume-gane.com
James Binnion Metal Arts
http://www.mokume-gane.com
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