About This Archive  | DCHAS-L 2020 Index   | DCHAS-L Yearly Index
person wearing a disposable face shield and surgical style mask

Check out Safety Emporium for your N95, N99, and face shield needs.

Previous by Date:
Subject: Re: [DCHAS-L] Face shields ineffective at trapping aerosols, says Japanese supercomputer
Date: Thursday, September 24, 2020 at 4:21:09 PM
Author: Zack Mansdorf <mansdorfz**At_Symbol_Here**BELLSOUTH.NET> 		Next by Date:
Subject: [DCHAS-L] Chemical Safety headlines (10 articles)
Date: Fri, 25 Sep 2020 07:35:39 -0400
Author: DCHAS Membership Chair

From: Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Face shields ineffective at trapping aerosols, says Japanese supercomputer
Date: Thu, 24 Sep 2020 20:32:52 +0000
Reply-To: Monona Rossol <actsnyc**At_Symbol_Here**CS.COM>
Message-ID: 71855024.386998.1600979572660**At_Symbol_Here**mail.yahoo.com
In-Reply-To <007e01d692b0$3e502ef0$baf08cd0$**At_Symbol_Here**bellsouth.net>


Hysteria, eh?  Don't p-s off all us old ladies.  My N95s are getting beat up and I'd like to get some new ones and can't.  How about reserving some vitriol for the reasons everyone can't have an N95 if they want one?  How many mouths have there been shortages?   And just how complicated is an N95 to manufacture?  We did better with ventilators because there was more money in it.  And the more I listen to people talk, the more 20 feet doesn't seem half far enough.  Monona


-----Original Message-----
From: Zack Mansdorf <mansdorfz**At_Symbol_Here**BELLSOUTH.NET>
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Sent: Thu, Sep 24, 2020 4:21 pm
Subject: Re: [DCHAS-L] Face shields ineffective at trapping aerosols, says Japanese supercomputer

Wow, a beacon of scientific truth........"The Guardian"

As Peter said, nothing new but also face shields were not to filter anything but rather redirect the airstream with large particles being impacted.  If we want to continue the hysteria, let's all only wear N-95's and social distance at least 20 feet or so since 5 micron aerosols might travel that far.  Additionally, maybe the supercomputer can decide the actual infective dose by particle size.  That would be beneficial to know along with mortality rates or even serious complication rates by age (e.g., risk profiles)

Zack

-----Original Message-----
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> On Behalf Of pzavon**At_Symbol_Here**ROCHESTER.RR.COM
Sent: Thursday, September 24, 2020 3:41 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: Re: [DCHAS-L] Face shields ineffective at trapping aerosols, says Japanese supercomputer

Not particularly new information for those of us with some understanding of filtration and aerosols. Still, to quote and paraphrase W. S. Gilbert, "Always happy to have my opinion supported by a competent authority." But as a computer model, "Is this a competent authority?"

Peter Zavon, MS, CIH
Penfield, NY

PZAVON**At_Symbol_Here**Rochester.rr.com



-----Original Message-----
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> On Behalf Of davivid
Sent: Thursday, September 24, 2020 3:16 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: [DCHAS-L] Face shields ineffective at trapping aerosols, says Japanese supercomputer

This article just came out in The Guardian.

"Plastic face shields are almost totally ineffective at trapping respiratory aerosols, according to modelling in Japan, casting doubt on their effectiveness in preventing the spread of coronavirus."

https://www.theguardian.com/world/2020/sep/22/face-shields-ineffective-trapping-aerosols-japanese-supercomputer-coronavirus

Dave Lane
Principal
Clavis Technology Development

---
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

Previous post   |  Top of Page   |   Next post


The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to secretary@dchas.org.
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.