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

[Mike Porter]

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.

----- Original Message ----- 
From: "Jerry Frost" <frosty at customcpu.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Thursday, February 09, 2006 8:01 PM
Subject: Re: [TheForge] FW: Didymium? I say "no way."


> Mike:
>
> When you say enhanced vision are you talking about simple safety or 
> actually enhancing vision, say magnification, etc.?
>
> Frosty
> -------------------------------
> 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>
>
>
>> Bob,
>> I put that kind of sloppy.  The book was well accepted. It's just 
>> frustrating wondering if the designs were accepted. Who knows, maybe they 
>> were. At any rate, that's history; there is a whole new subject at hand. 
>> What do you think of vision enhancement? Of course, it matters a lot more 
>> for gas welding and brazing than forge work.
>> Mike P.
>>
>
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