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Old 04-07-2020, 11:48 AM
neiowa neiowa is offline
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Do you people know how to use a search function? There are all manner of docs available of test of homemade masks vs an N95.

The homebrew remedies posted above are NONSENSE.

The thing Aunt Mabel sewed has about HALF the efficiency of a (useless) surgical mask.

An N95 mask (a real one from 3M not the chicom crap) is rated at 95% efficiency. If 95% of your primers worked in your ammunition would that be "better than nothing". How about if your brakes worked 95% of the time.

That the hospital biz is grinding on and USING N95 is pathetic joke. Yes a HUGE step up from their normal lackadaisical regard for infection and cleanliness in hospital but pathetic. ANYONE working on a chicom flu patient SHOULD be on a PAPR and wearing full TYVEK suit (as Hazmat level C).

Get to a Home Depot or Lowes or farm store or auto body shop supplier and buy 1/2 face P100 respirator for $30. And a pair of nonvented safety goggles. Or if you can find and can afford it a full face P100 ($250). You really won't need spare filters. As here:
https://www.3m.com/3M/en_US/company-...94857497&rt=r3

Stop screwing around with feel good busy work.
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Old 04-07-2020, 11:56 AM
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Quote:
Originally Posted by neiowa View Post
Do you people know how to use a search function? There are all manner of docs available of test of homemade masks vs an N95.

The homebrew remedies posted above are NONSENSE.

The thing Aunt Mabel sewed has about HALF the efficiency of a (useless) surgical mask.

An N95 mask (a real one from 3M not the chicom crap) is rated at 95% efficiency. If 95% of your primers worked in your ammunition would that be "better than nothing". How about if your brakes worked 95% of the time.

That the hospital biz is grinding on and USING N95 is pathetic joke. Yes a HUGE step up from their normal lackadaisical regard for infection and cleanliness in hospital but pathetic. ANYONE working on a chicom flu patient SHOULD be on a PAPR and wearing full TYVEK suit (as Hazmat level C).

Get to a Home Depot or Lowes or farm store or auto body shop supplier and buy 1/2 face P100 respirator for $30. And a pair of nonvented safety goggles. Or if you can find and can afford it a full face P100 ($250). You really won't need spare filters. As here:
https://www.3m.com/3M/en_US/company-...94857497&rt=r3

Stop screwing around with feel good busy work.

Non of this feels good, and I would rather be active in looking for a solution than try to discourage people.


The advent of 3d printing has made many new things possible and this is no different.
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Old 04-07-2020, 12:24 PM
Cephalotus Cephalotus is offline
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Originally Posted by NW GUY View Post
ONE OF the talk show docs was saying one of the best filters you could use for your home made mask was paper towel.
Look at this: https://smartairfilters.com/en/blog/...uses-diy-mask/

Better materials: https://smartairfilters.com/en/blog/...ce-mask-virus/
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Old 04-07-2020, 12:26 PM
Cephalotus Cephalotus is offline
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Originally Posted by jfountain2 View Post
The Kirby bags I ordered on eBay filter down to 0.3 microns so I’m thinking with the two layers of cloth in the homemade mask with two layers of hepa filter bags stuck in the pocket on the masks that should be a pretty decent amount of filtration. I’m working on finding activated charcoal screen material next. Just as an added layer...
I doubt that you will breath much through this filter system, but bypass it on it's sides.

You need very breathable materials
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Old 04-07-2020, 01:20 PM
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Quote:
Originally Posted by neiowa View Post
Do you people know how to use a search function? There are all manner of docs available of test of homemade masks vs an N95.

The homebrew remedies posted above are NONSENSE.

The thing Aunt Mabel sewed has about HALF the efficiency of a (useless) surgical mask.

An N95 mask (a real one from 3M not the chicom crap) is rated at 95% efficiency. If 95% of your primers worked in your ammunition would that be "better than nothing". How about if your brakes worked 95% of the time.

That the hospital biz is grinding on and USING N95 is pathetic joke. Yes a HUGE step up from their normal lackadaisical regard for infection and cleanliness in hospital but pathetic. ANYONE working on a chicom flu patient SHOULD be on a PAPR and wearing full TYVEK suit (as Hazmat level C).

Get to a Home Depot or Lowes or farm store or auto body shop supplier and buy 1/2 face P100 respirator for $30. And a pair of nonvented safety goggles. Or if you can find and can afford it a full face P100 ($250). You really won't need spare filters. As here:
https://www.3m.com/3M/en_US/company-...94857497&rt=r3

Stop screwing around with feel good busy work.
Your analogies are silly. Condoms are a widely accepted and highly effective form of birth control - in fact among the best available - and they're something like 99% effective. So yes, that's better than nothing at offering protection, just like masks that are 80, 90, 95% effective.
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Old 04-07-2020, 05:31 PM
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Be careful with using vacuum Hepa bags as filters. Quite a few contain fiberglass.
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Old 04-07-2020, 05:37 PM
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This is not me but a picture of a creative person online. Could be used doubled up with any traditional mask.

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Old 04-07-2020, 05:40 PM
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I also saw a video of a guy taking a furnace air filter and cutting it up and then using it folded into a elastic neck gator. The gator can be easily washed and the filter section is disposable. Very easy to create.
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Old 04-07-2020, 05:43 PM
AZ_HighCountry AZ_HighCountry is offline
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Originally Posted by leadcounsel View Post
I also saw a video of a guy taking a furnace air filter and cutting it up and then using it folded into a elastic neck gator. The gator can be easily washed and the filter section is disposable. Very easy to create.
What type of furnace filter? The ones we often called "old man hair" filters are fiberglass. Not a smart idea.

See my post above regarding the FPR 8-9 and 10+ filters. Many of those are cotton.
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Old 04-07-2020, 05:56 PM
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you can make an ok respirator, or a mask with a couple paper towels, but these are last resorts DIY. Go with the real thing and get an actual gas maks and some N100 filters.
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Old 04-07-2020, 06:44 PM
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Originally Posted by Cephalotus View Post
I doubt that you will breath much through this filter system, but bypass it on it's sides.

You need very breathable materials
If it ever gets here I’ll test it before I leave my house. If I can breathe, great, if not, I’ll try shop towels.
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Old 04-07-2020, 06:54 PM
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Let’s try to remember the point of making your own is there are of lot of new members and folks just looking around on this forum who were not into prepping before this virus and are now stuck at home with nothing.
Maybe they have vacuum cleaner bags that filter allergens, maybe they have shop towels. We should try to help them instead of focusing on telling people to go out and get a 3M mask, or some gas mask.
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Old 04-08-2020, 02:38 PM
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For the masks daughter and I are making, we're making them reversible, out of quilting cotton (tighter weave, plus I have a BIG stash of it) and using quilt batting for the innards. NOT the high-loft crap, I'm using the low loft "Warm and Natural" brand cotton batting.
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Old 04-10-2020, 05:44 PM
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Update to the HEPA filter vacuum bag idea, it works fine. I got my order today, cut the bags to fit the hand sewn mask put two layers of hepa filter in the mask and tried it on. No problems breathing through it. Made sure the mask was tight all around the edges, held a mirror up to the front so I could see where my breath steamed it up and the exhale was directly in front of the mask as it should be so, air flow breathing in should be able to follow the same path as the exhale meaning my air is coming in through two layers of cotton and two layers of hepa filter.

Compared it to breathing while wearing an actual N95 and it’s a little more restricted but not enough to worry about.

Overall I would say it’s a viable alternative if you can’t get real N95’s or better.

The pics below show the mask and the hepa filters inside it. I can change the filters and wash the mask when needed. The odd blue dots on the edge of the mask are from the sharpie I used to trace the mask out onto the vacuum bags...
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Old 04-10-2020, 06:30 PM
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There is this general idea

I would forget the oils and in the pocket formed by the first fold put a piece of hepa furnace filter. Also right in the fold I would put a thread a thin piece of wire through the fabric so that once wearing it I could bend the wire so the mask is held tight against my face around my nose.

If you live in an area where you can get milk pads/filters. you could cut a filter to the size of a bandanna and use that instead. I assume it would do a much better job than the bandanna, assuming you can breath through it.
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Old 05-13-2020, 10:58 AM
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Quote:
Originally Posted by neiowa View Post
Do you people know how to use a search function? There are all manner of docs available of test of homemade masks vs an N95.

The homebrew remedies posted above are NONSENSE.

The thing Aunt Mabel sewed has about HALF the efficiency of a (useless) surgical mask.

An N95 mask (a real one from 3M not the chicom crap) is rated at 95% efficiency. If 95% of your primers worked in your ammunition would that be "better than nothing". How about if your brakes worked 95% of the time.

That the hospital biz is grinding on and USING N95 is pathetic joke. .
With our current technology, N95 is the best it gets without a full face mask and a bottle of breathing air.
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Old 05-17-2020, 10:07 AM
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With our current technology, N95 is the best it gets without a full face mask and a bottle of breathing air.
Not really. There are N100 and P100, both provide better filtration than N95. There are also APR and PAPR systems and CBRN filters between disposable and SCBA.

ALL of you are forgetting is that it doesn’t matter whether you’re using shop towels, paper towels, HEPAA vacuum cleaner bags, or the same material used for commercial N95 masks... or even use a filter material that is superior to N95. If you can’t replicate the facial seal of an N95 mask... which I’m sorry, you’re not going to be able to do via DIY methods, your mask is nothing more than a surgical/cloth mask. Period, end of story.

The phrase “better than nothing” (which I’ll shorten to BTN) is overused in the prepping community. Far too often it’s used to justify really bad advice or a “bright idea” from someone who really doesn’t know what they’re talking about. The problem with BTN is it can alter behaviors in a negative fashion. In Emergency Management, especially events involving CBRN, this is especially problematic. Someone who is aware of a hazard, doesn’t have protection, and knows they aren’t protected will usually AVOID the hazard whenever possible, as much as possible. When you add the placebo effect of “better than nothing”, people start doing risk versus reward calculations based on whatever is at the center of the BTN claim. Now, instead of avoiding the hazard, you have more people confronting it, often unnecessarily because they perceive BTN as adding protection when it really doesn’t. Or, you have secondary, unintended consequences arising from the BTN advice. Those effects are most prevalent when BTN methods are used unnecessarily because the hazard either doesn’t exist or isn’t significant enough to justify the BTN methods.
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