[TheForge] Re: Cheap Autodarkening Welding Helmet.

[Kenneth Mayer]

>Date: Sun, 10 Aug 2003 22:19:59 -0400
>From: Steve Smith <sos@alum.mit.edu>


[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
:-)