[TheForge] Vision damage and welding shields pt 2

Sun Jan 12 23:36:00 2003

That might be true Marc.
 But if you coated the lenses with gold it would screen out the IR range.
I can put on my gold face shield and get so close to the fire that my hair
singes, but my face doesn't feel any heat at all.
Some part of the light spectrum is triggering the lens in the welding helmet
to darken.
 If you were to look at the sun or a bright welding arc for a few minutes
thru a welding lens, that didn't darken because you covered up the sensor
ports, you would most certainly do some serious and probably irreversible
damage to your eyes.
Chuck

----- Original Message -----
From: "Marc" <[email protected]>
To: "TheForge" <[email protected]>
Sent: Sunday, January 12, 2003 7:07 PM
Subject: Re: [TheForge] Vision damage and welding shields pt 2

> I believe that the auto-darkening lenses are equivalent to shade 14 at
> UV wavelengths during both light and dark modes. So the flash is
> supposed to be mostly a comfort thing. I don't know about IR, though.
>
> -Marc
>
> On Sat, 2002-01-12 at 02:08, Chuck Robinson wrote:
> > I was also  trying to point out the danger to welders eyes from long
term
> > exposure to welding flash during the lag time for auto darkening welding
> > helmets to shift from light to dark mode.
>
>
>
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