[TheForge] FW: Didymium? I say "no way."

[Mike Porter]

Frosty,
Will I be seeing you at ABANA 2006? I've been invited to demo the Gas Burner 
equipment, and thought to bring some vision stuff along.
Mike P.
----- Original Message ----- 
From: "Jerry Frost" <frosty at customcpu.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Friday, February 10, 2006 1:47 PM
Subject: Re: [TheForge] FW: Didymium? I say "no way."


> Seems like understanding the hazards their mechanics and good work habits 
> will go a long way. No surprise eh? Still, having effective safety gear is 
> a must. You're better off without gear than with ineffective gear.
>
> It's a worthy project Mike thanks.
>
> Frsty
> -------------------------------
> If it ain't forged
> it ain't real.
> Wrought iron is.
> The FrostWorks
>
> Meadow Lakes, AK.
>
> http://www.artmetalradio.com/
>
> From: "Mike Porter" <michael.a.porter at comcast.net>
>
>> Hi Jerry,
>> My personal interest is in enhancing vision through color manipulation, 
>> but that cannot be separated from safety issues because it multiplies 
>> them, just as magnification would. The more light your eyes receive, from 
>> magnification, or from manipulating light bands for increased visual 
>> impact along with increased comfort, the more IR they will receive when 
>> viewing heated surfaces and flames, unless you filter it carefully. What 
>> I'm recommending is a system for better control over your view of hot 
>> work.
>>
>> ANSI Z87.1-2003 allows you to do just that for "special purpose" light 
>> filters. It also leaves you pretty much on your own for protection from 
>> radiant hazards. So, how could I recommend that people assemble such 
>> filters without also showing them where to find the safety they take for 
>> granted with ANSI rated general purpose filters? That's why I'm harping 
>> on about safety issues from the very first. Not because IR is a terrible 
>> bogyman, but because when we start manipulating the views from hot work, 
>> we can accidentally make it into one. For instance, a dichroic notch 
>> filter in the green band provides a very relaxed view. You could look at 
>> a light bulb and think it wasn't all that bright this way, just as though 
>> you were using say a number four or five ANSI rated filter, but you'd be 
>> getting a big hit of IR, without your eyes reacting to the customary 
>> brightness of an incandescent bulb. Is running a torch without IR 
>> protection likely to hurt anyone? Probably not in the short run, but if 
>> they keep on doing so long enough it certainly will.
>> Mike P.
>>
>
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