[Jewelry making - Article 00785] - Re: [Orchid] Welding glasses with oxy/acetylene?

[SERVE4GWM]

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>     I do not know anyone who uses dark glasses when soldering with oxy
>     and propane. When using oxy acetylene, the flame is bright enough
>     to leave serious spots in your (my) vision even if not looking
>     directly at it. This is just not the case with propane, for
>     whatever reason. 

    It is critically important to understand you always need eye
    protection when using a torch, period. And not just against impact.
    Even our Spirflame[tm], even for "single gas" acetylene, propane,
    natural gas, etc. What we in the jewelry industry usually call
    soldering, is in fact properly termed as brazing. It s not just the
    flame appearance which can generate harm but the reflective light off
    of the soldering surfaces, workpieces, tools and fixtures, including
    even furnace brick and binding wire. The AWS specifies 3 to 5 shaded
    lenses for this purpose (get a 5) for brazing. I have and recommend
    a #6 for Platinum work and welding. Melting can require even more
    protection up to, and including a 10. And to add weight to what James
    Binnion has already said, Aur92 and Didymium lenses don't do a darn
    thing about UV or Infra Red, which you need to protect against! 

Best Regards,
Gary
Gary W. Miller, 
Sr. Technical Advisor
www.spirig.org
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