Do not use a products such as Rain-X on safety goggles. Rain-X is specifically used for exterior glass. The directions stated that it is not to be used on the interior
of windshields.
For diving and snorkeling, spit worked well for the lenses in our masks. This is definitely not recommended for eyeglasses or safety goggles. I cannot recall the
anti-fog solution I used for my ski goggles.
We always used B & L Sight Savers spray for goggles with good success. It is anti-static and anti-fog. It's also available in wipe form. When I was actively teaching,
my students were always instructed to use it to clean their goggles at the start of every lab class. Its not expensive at about $5 - $6 for a 16 oz spray bottle. Also supply soft, lint-free tissues for drying the lenses.
_________________________________________________________________________
David A. Katz
Chemist, Educator, Expert Demonstrator, Science Communicator, and Consultant
Programs and workshops for teachers, schools, museums, and the public
5003 Canby Dr. * Wilmington, DE 19808-1102 * USA
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----- Original Message -----
Sent: Wednesday, September 2, 2020 2:56 PM
Subject: Re: [DCHAS-L] Goggles & Face mask=fogging
Actually, the coating needs to be hydrophilic rather than hydrophobic.
You want the water droplets to spread out into a film rather than bead
up. Rain drops are large enough to roll off a hydrophobic film but fog
droplets are too small to do this.
Dave Lane
Principal
Clavis Technology Development
On 9/2/20 11:16 AM, NEAL LANGERMAN wrote:
> Expanding on my previous reply - what is needed is a hydrophobic film
> that bonds to the interior surface of the goggle. This is exactly how
> Rain-X and related siloxane in alcohol products work.
>
> I have never tried one of those products on goggles; they work really
> well on shower doors.
>
> Easy experiment to do. Curious about the outcome.
>
> Neal
>
>
> Stay healthy and stay safe
> NEAL LANGERMAN, Ph.D.
> 5340 Caminito Cachorro
> San Diego 92105
> +1 (619) 990-4908
> <mailto:neal**At_Symbol_Here**chemical-safety.com>
neal**At_Symbol_Here**chemical-safety.com
>
> From: ACS Division of Chemical Health and Safety
> <DCHAS-L**At_Symbol_Here**Princeton.EDU> On Behalf Of Debra M Decker
> Sent: Wednesday, September 2, 2020 10:50 AM
> To: DCHAS-L**At_Symbol_Here**Princeton.EDU
> Subject: Re: [DCHAS-L] Goggles & Face mask=fogging
>
> <Has anyone found a workable solution to the problem with face
> mask+goggles= fogging in student chemistry labs?>
>
> I wonder if any of the scuba divers in our midst (I'm looking at you,
> Neal Langerman), might have ideas. I know this has been discussed
> several times over the years but don't recall there being any really
> good solutions.
>
> D-
>
> Debbie M. Decker, ACS Fellow
> DCHAS Councilor
> Programming Co-Chair
> Retired Chemistry Dept. Safety Manager
> dmdecker**At_Symbol_Here**ucdavis.edu <mailto:dmdecker**At_Symbol_Here**ucdavis.edu>
> (916)616-7548
>
>
>
>
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