From: Jack Reidy <jreidy2**At_Symbol_Here**STANFORD.EDU>
Subject: Re: [DCHAS-L] An interesting mask video
Date: Fri, 31 Jul 2020 15:37:43 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: BYAPR02MB56866ECC0A636C0EE8144FCA8C4E0**At_Symbol_Here**BYAPR02MB5686.namprd02.prod.outlook.com
In-Reply-To


Tyrell,

 

I think there is some validity, though it's not how I personally would choose to demonstrate it. While the video may not show the dynamics of how the virus spreads or is contained, it does demonstrate aerosol particles being contained by a mask. It's not a water aerosol, so not one-to-one the same, but I believe the point stands. As for VOCs, I think that the ether in the aerosol evaporates out of the aerosol droplets quickly and the vapors disperse before reaching the flame. Regardless, I don't think spraying starting fluid directly into a mask is an accurate model of someone breathing through a mask in an atmosphere containing some concentration of VOCs.

 

Sincerely,

 

Jack Reidy (he/him)

Research Safety Specialist, Assistant Chemical Hygiene Officer

Environmental Health & Safety

Stanford University

484 Oak Road, Stanford, CA, 94305

Tel: (650) 497-7614

 

 

 

From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> On Behalf Of Tyrell Towle
Sent: Friday, July 31, 2020 8:08 AM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: Re: [DCHAS-L] An interesting mask video

 

What did we learn from the video? My take-away is that VOCs do indeed build up behind masks, which is a concern that has been expressed before. This demonstration has nothing to do with the dynamics of how coronavirus might be contained behind a mask or spread without one. This demonstration reminds me of the demonstrations that Dr. Oz performs on his show - demonstrations that have nothing to do with the phenomenon being described except to provide a visual. "Look at how the fat melts away!"  (it was some kind of water soluble starch or something being doused with water...).

 

-Tyrell

 

On Thu, Jul 30, 2020 at 10:53 AM Nicole Thomas <thoma519**At_Symbol_Here**purdue.edu> wrote:

Thanks for sending the video. It was great! It was humorous and educational.

Kind Regards,

Nicole C. Thomas

 


From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> on behalf of Melinda Box <melinda.box**At_Symbol_Here**GMAIL.COM>
Sent: Thursday, July 30, 2020 10:50:46 AM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Subject: Re: [DCHAS-L] An interesting mask video

 

I think this will be a huge help in communicating with those who might dig their heels in.

 

Thanks!

 

On Thu, Jul 30, 2020 at 11:33 AM Jack Reidy <jreidy2**At_Symbol_Here**stanford.edu> wrote:

It certainly does make a point! I was a bit curious about the video creator, especially given his "see you in a couple years" sign off and the response in some of the video comments. Turns out he came out of "retirement" to make this after not posting a video since September 2017.

 

Jack Reidy (he/him)

Research Safety Specialist, Assistant Chemical Hygiene Officer

Environmental Health & Safety

Stanford University

484 Oak Road, Stanford, CA, 94305

Tel: (650) 497-7614

 

 

 

From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> On Behalf Of Monona Rossol
Sent: Wednesday, July 29, 2020 1:52 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: Re: [DCHAS-L] An interesting mask video

 

Just my kind of video.  Thanks a lot of fun.  Thank gosh it was done outside.  Not a demo for the faint of heart.

 

Monona

-----Original Message-----
From: davivid <davivid**At_Symbol_Here**WELL.COM>
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Sent: Wed, Jul 29, 2020 4:00 pm
Subject: [DCHAS-L] An interesting mask video

I just ran across a mask effectiveness video you may find interesting.

It's not one of those lab coat/goggles professional type ones. This one

is aimed at a more blue collar audience and definitely gets the point

across.

 

It's not something you would do for a class demo. See how many safety

issues you can find.

 

 

Cheers!

 

Dave Lane

Principal

Clavis Technology Development

 

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