[Jewelry making - Article 00857] - Re: [Orchid] Welding glasses with oxy/acetylene?

[James Binnion]

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>     Also, I thought I understood that ordinary plastic spectacles
>     provide adequate protection from the levels of infrared and UV
>     given off by single gas and propane/oxy torches. Did I
>     misunderstand? 

    Some plastics are good at UV filtering but not necessarily for
    infrared. As for the shaded filters, it is not just the light from
    the torch but the secondary radiation from things like fire brick,
    flux binding wire etc. Shaded lenses can make it easier to see what
    is going on in some circumstances but can also make it harder in
    others. I have tried to use shade 3 for all soldering, it is just
    too hard to judge color when wearing them so I tend to only wear them
    or darker ones when casting and working on high temperature metals
    like platinum. There should be a way to get filters that work in UV
    and IR but not in the visible range or are at least a neutral density
    (grey) so that the color vision would not be adversely affected.
    However I haven't found any such lenses. 

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