From: Richard Sullivan FRPS (richsul@earthlink.net)
Date: 09/27/01-09:28:56 AM Z
Plastic safety glasses unless they state they are UV filtering do not
filter UV.
Back in the mid 60's I worked at Spectrolab as a technician and we made
solar simulators using banks of 2500 watt Osram Xenon arc lamps. It was at
that time that standard eyeglasses went from glass to plastic. We had a few
serious eye burns before the problem was detected. I got burned quite a few
times in those pre-OSHA days and spent more than one sleepless night with
burnt eyes and tears running down my cheeks. Glass filters UV but plastic
(unless specially treated for UV) does not.
--Dick Sullivan
At 10:15 AM 9/27/2001 -0400, you wrote:
>Cor:
> I have a 1500 watt metal halide unit in my basement, as well as a good UV
>meter centered at 400 nm. All graphic arts units come with safety glass
>that cut out the most harmful rays (those below 310 nm). Safety glasses
>(usually made of polycarbonate) do a great job of cutting out the rest.
>These are available for 5-6$ apiece from most science supply houses.
>Cheers, Ed Stander
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