[Jewelry making - Article 00056] - Re: [Orchid] Twenty MuleTeam Borax

[coralnut]

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    Jim, Not sure I agree with you about the temperature variations
    between borax and boric acid. Borax, I believe provides the high
    heat protection from around 700 degrees F to its fusing temperature
    of 1350 degrees F. Boric acid, on the other hand, provides surface
    protection at temperatures between 270 and 400 degrees F, a critical
    range in which the metal is absorbing large amounts of heat and
    oxygen. That is one reason, I believe, both are included in the
    Prip's flux formula. 

    What say some of the chemists on the list? 

    Cheers from Don at The Charles Belle Studio in SOFL where simple
    elegance IS fine jewelry! dcdietz AT comcast.net

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