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Re: [Orchid] Ultra Violet Vision Protection for Silver Soldering?
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jesse brennan Monday, October 28, 2002
   
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    Your eyes are  unable to see   energy  above the blue  end of the
    spectrum  - the ultra violet , but this light is  dangerous to them
    and to your skin..  Glass is relatively transparent to these rays
    but the current plastic polycarbonate  lenses  block 100% of this
    radiation or can be easily made to do so with dyes that still leave
    them  totally clear  for vision.   If you are wearing these either
    for corrective vision  or as safety glasses your are protected from
    this  whether the ultra violet originates from the sun or flame
    sources.  Tinted lenses  reduce the intensity of light so vision is
    better but glass ones do not necessarily protect against UV
    exposure. Tinted glass  welding lenses reduce the intensity but UV
    protection is provided by the  polycarbonte  "protective"  piece . 
    For the typical jewelry soldering  with  small flames you are
    protected from UV with  the proper  plastic safety glasses or your
    normal plastic polycarbonate  vision"glasses".     Optivisors   have
    glass lenses and provide no protection  from UV by themselves but
    will if used ion conjunction with polycarbonate safety or vision
    correcting polycarbonate "glasses ". Infra red  radiation - "heat" 
    is below the red end of the visible spectrum .  Neither  normal
    glass or polycarbonate lenses provide much protection  from intense 
    infra red radiation or "heat". Small soldering flames are not much
    concern but looking into hot kilns or furnaces or the very intense
    oxy fuel flames used by borosilicate glassworkers  will cause
    permanent damage . 

    As Jim Binnion suggests the best source for proper eye protection
    for craftspeople is Aura lens: 

    http://www.auralens.com/ 

    They will help you select the proper vision aids without the hype
    and very often incorrect information from other sources. 

    Additional valuable information can be found at: 

    http://www.x-celoptical.com/ 

    These people do not serve the direct market but  provide a lot of
    information on their site. 

Jesse



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