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...).
Thanks for sending the video. It was great! It was humorous and educational.
I think this will be a huge help in communicating with those who might dig their heels in.
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
It's not something you would do for a class demo. See how many safety
Clavis Technology Development
Follow us on Twitter **At_Symbol_Here**acsdchas
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at
membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at
membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at
membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at
membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at
membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
