iandol on sat 1 sep 01
I would be concerned about using lenses made from a plastic material =
such as Polycarbonate, as a means of protecting my eyes from radiant =
heat, especially if they do not have a deep tint.
Not only is it necessary to adsorb the IR (Heating) radiation and the UV =
but our eyes need protecting from glare, which can be intense from any =
kiln, even as slow as cone 08.
My preference is to use welding goggles of a grade suitable for gas =
welding.
Ivor Lewis. Redhill, South Australia.
Steve Mills on mon 3 sep 01
I absolutely agree.
The only safe glasses for use in this situation, are the green ones
provided for use with Oxy-acetylene welding. No other glasses will
protect the eyes.
Steve
Bath
UK
In message , iandol writes
>I would be concerned about using lenses made from a plastic material =3D
>such as Polycarbonate, as a means of protecting my eyes from radiant =3D
>heat, especially if they do not have a deep tint.
>Not only is it necessary to adsorb the IR (Heating) radiation and the UV =
>=3D
>but our eyes need protecting from glare, which can be intense from any =3D
>kiln, even as slow as cone 08.
>My preference is to use welding goggles of a grade suitable for gas =3D
>welding.
>Ivor Lewis. Redhill, South Australia.
--
Steve Mills
Bath
UK
Snail Scott on tue 4 sep 01
At 09:11 AM 9/3/01 +0100, you wrote:
>The only safe glasses for use in this situation, are the green ones
>provided for use with Oxy-acetylene welding. No other glasses will
>protect the eyes.
>
>Steve
I was under the impression that glassblowers' goggles were
sufficient; is this not the case?
I thought the IR was the only critical factor; do I really
need darker lenses? I didn't think the visible spectrum was
much of a hazard, and thought that dilating my eyes with
dark lenses would do more harm than good.
I suspect that IR must do something. When I was in charge of
firing all the gas kilns in college, and would spend many
cumulative hours a day up close tending them, I started
getting strange freckle patterns on my lips. Eventually
they all connected into a continuous freckle-colored line
all the way around my lip, as though I'd used a lip-liner
pencil, and it stayed until I quit doing that kind of firing.
It faded away afterward, freckle-like. I asked doctors what
the risks of constant IR exposure might be, and mentioned my
odd effect, but none of them had ever heard of skin (or eye)
damage from IR. They knew all about UV, but a kiln doesn't
put put out much UV at all, and visible light only from the
peepholes and burner ports.
(I've only fired electrically lately, which doesn't require
the same constant tending. Less personal presence in the
kiln yard, and less peephole checking.)
So, my personal experience seems to indicate an IR effect,
but is it hazardous? I figured maybe, so I use the glass-
blowers' lenses, but the doctors I've met can't confirm it.
Likewise no info on visible light.
Anecdotal information from older clay folks I've met seems
to indicate a pattern of corneal damage to the eye. Is this
tendency confirmed statistically? If so, is it caused by
IR and/or visible light? Doea anyone have actual facts?
Does anyone have a _scientific_ knowledge of eye (or skin)
damage from IR or visible wavelengths? (Edouard? Tom?)
I'd love to have some actual facts!
-Snail
Steve Mills on wed 5 sep 01
My information came from an eye specialist, but then neither he nor I
had met (at that time, or since in my case) a glass worker who used
glasses/goggles.
Steve
Bath
UK
>I was under the impression that glassblowers' goggles were
>sufficient; is this not the case?
>
>I thought the IR was the only critical factor; do I really
>need darker lenses? I didn't think the visible spectrum was
>much of a hazard, and thought that dilating my eyes with
>dark lenses would do more harm than good.
>
>I suspect that IR must do something. When I was in charge of
>firing all the gas kilns in college, and would spend many
>cumulative hours a day up close tending them, I started
>getting strange freckle patterns on my lips. Eventually
>they all connected into a continuous freckle-colored line
>all the way around my lip, as though I'd used a lip-liner
>pencil, and it stayed until I quit doing that kind of firing.
>It faded away afterward, freckle-like. I asked doctors what
>the risks of constant IR exposure might be, and mentioned my
>odd effect, but none of them had ever heard of skin (or eye)
>damage from IR. They knew all about UV, but a kiln doesn't
>put put out much UV at all, and visible light only from the
>peepholes and burner ports.
>
>(I've only fired electrically lately, which doesn't require
>the same constant tending. Less personal presence in the
>kiln yard, and less peephole checking.)
>
>So, my personal experience seems to indicate an IR effect,
>but is it hazardous? I figured maybe, so I use the glass-
>blowers' lenses, but the doctors I've met can't confirm it.
>Likewise no info on visible light.
>
>Anecdotal information from older clay folks I've met seems
>to indicate a pattern of corneal damage to the eye. Is this
>tendency confirmed statistically? If so, is it caused by
>IR and/or visible light? Doea anyone have actual facts?
>
>Does anyone have a _scientific_ knowledge of eye (or skin)
>damage from IR or visible wavelengths? (Edouard? Tom?)
>
>I'd love to have some actual facts!
>
> -Snail
--
Steve Mills
Bath
UK
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