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Offlinedistortion
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Am I using the right kind of Tyvek?(need answers QUICK!)
    #1584155 - 05/28/03 05:50 AM (21 years, 1 month ago)

Hello I have some Tyvek envelopes that I used for filter disks. The envelopes look like normal paper but with more fibers and a little bit shiny. I seriously can't understand how and air circulation can get through this? I put it up to my mouth and blew and barely any air got through. Can someone reassure me that I'm doing the right thing? :tongue:
Also there is a layer of tinfoil screwed on under the lid and a layer of tyvek over the lid but under the screw on part of the lid. Will this allow enough air circulation? Thanks.


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Think for Yourself. Question Authority.

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Edited by distortion (05/28/03 07:12 AM)

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OfflineAnnoA
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Re: Am I using the right kind of Tyvek? [Re: distortion]
    #1584219 - 05/28/03 06:58 AM (21 years, 1 month ago)

>there is a layer of tinfoil screwed on under the lid and a layer of tyvek over the lid but under the screw on part of the lid. Will this allow enough air circulation?

Of course not! Dump that foil out!

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Offlinedistortion
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Re: Am I using the right kind of Tyvek?(need answers QUICK!) [Re: Anno]
    #1584231 - 05/28/03 07:07 AM (21 years, 1 month ago)

Ok, thanks for the tip Anno. As far as the jar lid goes, there are 4 tiny nail holes covered with a tyvek filter disk. Will the Tyvek actually allow any practical air exchange through these small holes? Or will it be sufficient?
ALSO,
should I lift the tyvek and inject through holes, or inject through tyvek? I was thinking that I probably wouldnt want holes of any size in the filter disk.
I need help ASAP, thanks.


--------------------
Think for Yourself. Question Authority.

-Timothy Leary

Edited by distortion (05/28/03 07:11 AM)

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OfflineAnnoA
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Re: Am I using the right kind of Tyvek? [Re: distortion]
    #1584238 - 05/28/03 07:12 AM (21 years, 1 month ago)

grain jars: tyvek or polyfill, good
PF tek substrate with dry vermiculite layer: tyvek not needed at all.

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Offlinedistortion
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Re: Am I using the right kind of Tyvek? [Re: Anno]
    #1584261 - 05/28/03 07:26 AM (21 years, 1 month ago)

yes I'm using grains
so,
1) Will the small nail holes covered with tyvek provide sufficient air exchange?
2) Should I inoculate through Tyvek, or lift it and inject through just the lid? My thoughts were that even a needle sized hole in the tyvek would lead to contams.
thanks a bunch


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Think for Yourself. Question Authority.

-Timothy Leary

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OfflineAnnoA
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Re: Am I using the right kind of Tyvek? [Re: distortion]
    #1584282 - 05/28/03 07:40 AM (21 years, 1 month ago)

>1) Will the small nail holes covered with tyvek provide sufficient air exchange?

I usually use 2 pencil sized holes.

>2) Should I inoculate through Tyvek, or lift it and inject through just the lid?
I lift the lid, but I use a hepa flow hood.

Let me show you what I use:



This is masking tape, btw, it will withstand the pressure cooker.

You can make a small extra hole and cover it with tape, just for inoculation.

inoculation with 1 N, btw....

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OfflineGhosty
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Re: Am I using the right kind of Tyvek? [Re: Anno]
    #1584572 - 05/28/03 10:44 AM (21 years, 1 month ago)

so anno for someone that is doing this for the first time would you just suggest using tinfoil.. and leaving it on? Or what else would you suggest I do, keeping it quite basic


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OfflineAnnoA
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Re: Am I using the right kind of Tyvek? [Re: Ghosty]
    #1584614 - 05/28/03 11:04 AM (21 years, 1 month ago)

For grain jars?
If possible, use some kind of a filter lid, although I have relatively successfully used also only aluminum foil on top.

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