mask sterilization

Review the actual source material.

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Temperature excursions are recorded and reported.

-hence the tea towels.

While the lack of water will affect their normal performance as rice cookers, the actual function is demonstrated as safe and effective here.

Rice cookers are often used to maintain a batch of cooked rice in an edible condition all day, in busy households or institutions, where regularly timed meals are not practical.

One that 'just turns off', would never sell to anyone who has to use one regularly. Do you?

RL

Reply to
legg
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Review the actual source material.

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I posted these links after my mother (~85yrs) indicated that the information was useful for residents in her high-rise seniors' condominium.

Washing the homemade surgical masks that they were making was getting to be a bit of a PITA, and wearing on the material. These people are not uneducated or inexperienced.

The researchers who released this information were doing so in the same spirit and, no doubt expect to recieve the type of feedback produced in this newsgroup. Their references are full of similar and deviating findings that were published previously.

The most helpful feedback will be anything that advances the effectiveness of simple mask re-use procedures, either through the direct relation of equipment and procedures that didn't work (to avoid the same problem by others) or those that did work (to refine or further simplify the technique).

For example: if you know of a specific rice cooker model that won't work, then, by all means, please specify the make and model of that device.

If you find that brown kraft paper bags, with people's names on them, works just as well as tea towels, you'll be confirming the results of researchers noted in the original article's references.

If you just have doubts - then google them first. They're pointless without some sort of real work to show that your doubts have some kind of real foundation.

RL

Reply to
legg

I wonder if it gets rid of the bad breath stink.

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Reply to
Ingvald44

Why not just toss it in the laundry? The wash and dry would kill viruses. Add a bit of bleach for extra insurance.

Geez, this virus has been raging for 6 months now.

Reply to
John Larkin

Because that damages the mask and reduces its effectiveness.

The whole point of these investigations is to find the cleaning regimen that destroys the virus but maintains the performance of the mask.

Even with the recommended procedures, the masks may only last a handful of cleanings.

Mainly in the US, because of the disastrous approach to managing it.

Reply to
keith

Yes, and no water.

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Reply to
Ricketty C

s

Ministry of Education / Medical Molecular Virology Laboratory of Health Co mmittee and School of Public Health together published a scientific researc h paper "Experimental research on safe and rapid regeneration of disposable medical masks". It was published in the Journal of Microbiology and Infect ion online version. The research paper confirmed that disposable medical ma sks could be disinfected by using following method: After using the mask, i t can be wrapped with household fresh-keeping bags and treated with househo ld electric hair dryer for 30 minutes. After that it can be used again. Thi s method doesn?t affect masks original filter retention effect, and the contaminated viruses are inactivated!"

e

Kong.

Why, do you wish to degrade the fibers of your clothes? Anything that goes through a laundry wash cycle is already free of the coronavirus. In case you missed the word, soap and water are the most effective killing agents f or this virus. It is recommended above alcohol, but is not practical for f requent use or in locations without water. In both cases you need to use i t for an extended time. People seldom wash their hands for a long enough t ime and most alcohol based hand cleaners are really just token efforts used like it was just hand lotion rather than trying to kill anything.

There is no point in adding a UV light to anything in your household. UV i s way down the list for killing viruses effectively unless it is for treati ng water. Even there I'm pretty sure it is more effective on the bacteria.

No need to bother with UV at all.

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Reply to
Ricketty C

Mostly in the US where we have far too many in denial of the disease.

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Reply to
Ricketty C

The inventor of the mask material, retired 3M scientists Peter Tsai, investigated several methodologies. " His central finding was that N95 masks can be heated at 158 degrees Fahrenheit for 60 minutes using a dry heat method without diminishing the filtration technology, and his hypothesis was validated by the National Institutes of Health."

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Reply to
Fred Bloggs

Actually, I was thinking about cloth masks. Sorry.

You might look at the stats. There are second bumps building in most european countries.

The US is #10 in the world on per-capita deaths, below several european conntries.

Reply to
John Larkin

Larkin really missed his calling. Cherry picking is what he is really, rea lly good at. One moment he it talking about countries with rising infectio n rates ignoring the huge infection rate in the US (20% of the world while only 4% of the world population. Then he compares the number of total deat hs per capita rather than looking at the near zero current death rates in t he countries he just mentioned.

Yeah, Larking is big on data, as long as it suits his goals. Meanwhile he chooses to stick his head in the sand and ignore what's going on around him . His own state of California is doing a terrible job of it.

I read that the governor of Georgia did finally relent and allow cities and counties to impose mask mandates.

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Reply to
Ricketty C

ess

e, Ministry of Education / Medical Molecular Virology Laboratory of Health Committee and School of Public Health together published a scientific resea rch paper "Experimental research on safe and rapid regeneration of disposab le medical masks". It was published in the Journal of Microbiology and Infe ction online version. The research paper confirmed that disposable medical masks could be disinfected by using following method: After using the mask, it can be wrapped with household fresh-keeping bags and treated with house hold electric hair dryer for 30 minutes. After that it can be used again. T his method doesn?t affect masks original filter retention effect, a nd the contaminated viruses are inactivated!"

ide

d
s
.

g Kong.

es through a laundry wash cycle is already free of the coronavirus. In cas e you missed the word, soap and water are the most effective killing agents for this virus. It is recommended above alcohol, but is not practical for frequent use or in locations without water. In both cases you need to use it for an extended time. People seldom wash their hands for a long enough time and most alcohol based hand cleaners are really just token efforts us ed like it was just hand lotion rather than trying to kill anything.

is way down the list for killing viruses effectively unless it is for trea ting water. Even there I'm pretty sure it is more effective on the bacteri a.

I didn't say the UV light was needed, only that someone could sell such a thing.

GH

Reply to
George Herold

Tsai tested to 158F is 70C - and there is no mention of sterilizing effectiveness.

Univ Ill reported dry heat tests for 20 cycles of 212F 100C with recorded filtration and sterilization effectiveness.

RL

Reply to
legg

The above links does not work. This works better:

.

They say that dry heat works. They do not say that moist heat does not work.

Here is some more on the matter of moist heat by various routes.

.

Unaided microwave-oven energy does not work, because the virus particles (or the droplets they ride) are too small to couple to a 2.5 GHz RF field. So, the microwave is an unneeded complication.

Joe Gwinn

Reply to
Joe Gwinn

Water is also an unneeded complexity.

RL

Reply to
legg

Hairsplitting. This is dry steam at 100 C and atmospheric pressure.

The standard best way to calibrate a thermometer to 100 C is to stick the sensing end into a closed steamer - the temp will be exactly 100 C, even if the water isn't pure or the heat uniform, because what one is actually measuring is the temperature at which condensation on the thermometer ceases, which is equivalent to the boiling point of pure water at atmospheric pressure.

See also the reference on moist heat in my other reply in this thread.

Joe Gwinn

Reply to
Joe Gwinn

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