From: Richard Sullivan FRPS (richsul@earthlink.net)
Date: 09/29/01-09:55:25 AM Z
Another clue is ozone. High intensity UV light of the kind that is
dangerous splits O2 into O. Ozone has a sweetish acrid smell. You can smell
it in the air after a thunderstorm. Early photo copiers were notorious for
generating ozone in office environments. The big ones at Kinkos are vented
for safety. If you light is generating ozone then it is most likely
dangerous. No ozone output or no ozone smell puts it into the "maybe" zone.
--Dick
t 11:44 AM 9/27/2001 -0400, you wrote:
>Cor,
>
>I have set up the light in an alcove that is created by a dormer window,
>with a curtain on the inside that I pull down during exposure. The curtain
>blocks virtually all of the light from the adjacent room. The color of the
>exposing light, though on the the cool side, is visibly more white than
>blue. Metal halide units emit most of their radiation in several spikes
>beginning at the upper, less dangerous end of the UV zone, from about
>350nm, to the blue and green to around 500nm. The bottom line is that you
>want to protect your skin and eyes from UV light as much as possible but
>extraordinary precautions are not required to work safely with most most
>metal halide units.
>
>Sandy
>
>
>
>>Sandy King wrote:
>>
>>> Recently, however, I set up a second UV exposing unit consisting of
>>> a 1000 watt 5K metal halide unit.
>>
>><snipperdesnip>
>>
>>..Sandy I read your accounts on your new UV unit with interest, but how
>>about safety. I presume you produce an awfull lot of relative harmfull
>>blue (is that the colour you see?) UV light, so do you wear UV blocking
>>glasses when you expose, or do you leave the room when exposing, or did
>>you build a kind of chamber around it?..
>>
>>Best,
>>
>>Cor
>
>
>--
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