[TheForge] Re: Cheap Autodarkening Welding Helmet.

Mon Aug 11 07:15:03 2003

Ahh, now I am illuminated!

Steve

Kenneth Mayer wrote:
>>Date: Sun, 10 Aug 2003 22:19:59 -0400
>>From: Steve Smith <[email protected]>
> 
> 
> 
> [snip]
> 
> 
>>>A quick go/no-go test for UV absorption is to look at a UV light source
>>>through the lens/shield.  The light source souuld should appear dark.
>>
>>I agree that the front clear plastic shield should stop the UV.
>>You can't tell anything, however, about UV by looking--UV is not visible
>>to the human eye.
> 
> 
> 
> That's what I get for typing too fast...   If you shine the UV source
> against an object that is fluorescent under UV, then put the plastic shield
> between the source and the object, and will no longer fluoresce.
> 
> Ken
> :-)
> 
> 
> 
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