mbarre@juno.com wrote:
>
> After burning a couple of pounds of wire putting a new floor in my
> Spitfire, I came to the conclusion that a new helmet was called for.
> Northern has an autodarkening one for under $80!.
>
> Are these proven safe?
I realize this isn't a scientific response, but I use a cheap
one all the time, with no effects. Generally with insufficient
shielding sore eyes come in before any major damage, and I
certainly haven't had that.
There are two kinds of auto darkening ones, the powered
ones that are in the order of 1/25000th of a second, and
the "solar powered" ones that just use the flash, and they
are more like 1/5000th of a second.
I use the faster ones that use a battery.
I wouldn't be too surprised if the prices are falling,
they are kind of a "high tech" thing and high tech
prices do that. ;>
--
Trevor Boicey, P. Eng.
Ottawa, Canada, tboicey@brit.ca
ICQ #17432933 http://www.brit.ca/~tboicey/
"Bart, you can't weld with such a little flame!" - Homer
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