Date: Thu, 30 Sep 2010 23:59:16 EDT
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: ACTSNYC**At_Symbol_Here**CS.COM
Subject: Re: UV and gas discharge tubes

The ad you referenced says clear carbonate "Lenses provide 99.9% UV protection."  But that's ridiculous.  If that were the case, we could wear those for welding.  The new ANSI Z87.1 standard requires two letters, one to identify the shade and the other to identify the UV protection on the lenses.  The ad you pulled is still using the old Z87 that only identifies high impact with a +.  The new rating for lenses will be:

Lens type Clear none

Welding W  and Shade Number (range from
1.3-14=E2=80=94the higher the number, the
darker the lens

UV filter U  and Scale Number (range from
2-6, the higher the number the higher
the protection from UV

So soon, you will see a string of letters and numbers on each lens.  They will be in the pattern of first a 3 digit code identifying the manufacturer, then the Z87 logo, then a + if the lens is for impact, then a 2 if it is prescription ground, then the W and shade number, the U and scale number, and other info I won't go into here.

It's a WONDERFUL system.  FINALLY when I look at someone's eyewear, I will know exactly what it is for and not for.  Hooray for ANSI.


In a message dated 9/30/2010 6:13:10 PM Eastern Daylight Time, arienh222**At_Symbol_Here**HOTMAIL.COM writes:

Many clear goggles are UV resistant. If you make sure the goggles you require for students to purchase (or the goggles you are providing if they aren't purchasing their own) protect against UV, it will eliminate any concern about the UV light source. As an example:


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