[Jewelry making - Article 00722] - Re: [Orchid] Welding glasses with oxy/acetylene?

[James Binnion]

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>     The spots were my first warning sign. 

    Yes there is a difference (Propane 5,111 F Acetylene 5780 F) but it
    is no where near the temp of the surface of the sun which is 5,780 K
    or 9800 F. The oxyacetylene flame radiates very little UV but is very
    bright in the visible spectrum and this is the cause of the spots
    you saw. Any bright enough visible light source will damage your
    eyes. A UV blocking lens can be clear in the visible light range. 

    UV is definitely a problem at arc welding temperatures (11000 F) but
    not at oxy-gas temperatures. If UV was present in any significant
    amount you would get a sun burn from your torch. 

James Binnion
jbin AT mokume-gane.com
James Binnion Metal Arts
http://www.mokume-gane.com
360-756-6550
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