[TheForge] (no subject)

[Steve Smith]

To put what others have said a different way, there are a couple of 
issues with hot metal and glass work:
1. Eye protection (protecting the eyes against UV and IR)
2. Work visibility
The first one is clearly important; it is my understanding that didymium 
lenses do not contribute to eye protection (any more than a pair of 
safety glasses do).

The point to didymium lenses is to block the very bright sodium glare 
that glass has. I had a pair years ago that I thought let me see better 
what was going on inside the coal fire. Not a huge difference, and I'm 
not sure it was a useful one (other than making me feel like I got 
something for my $40).

If you need to block the bright yellow color, didymium is the right 
lens. If you want to guard your eyes, wear a light tinted welding lens, 
or just don't stare in the fire. The fire is sort of like TV, strongly 
drawing the eyes.

Steve


Lynn and Susan Lang wrote:
> Hello
> 
> A welding question...
> 
> Having read about didymium glasses for viewing my metal and fire I went
> looking for a pair, none of my local welding suppliers know anything
> about them. 
> 
>  
> 
> Which leads me to the question, do I need them or is another product as
> good ? 
> 
>  
> 
> The pair I liked was a clip on, something I could use on my safety
> glasses as needed. 
> 
>  
> 
> Lynn
> 
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