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 distortion
Registered: 12/11/02
Posts: 603
Loc: Murder Mitten
Last seen: 6 years, 5 months
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 Am I using the right kind of Tyvek?(need answers QUICK!) 
#1584155 - 05/28/03 06:50 AM (17 years, 9 months ago) |
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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? 
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.
-Timothy Leary
Edited by distortion (05/28/03 08:12 AM)
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Anno
Experimenter
Registered: 06/17/99
Posts: 24,141
Loc: my room
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 Re: Am I using the right kind of Tyvek? [Re: distortion]
#1584219 - 05/28/03 07:58 AM (17 years, 9 months ago) |
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>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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distortion
Registered: 12/11/02
Posts: 603
Loc: Murder Mitten
Last seen: 6 years, 5 months
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Re: Am I using the right kind of Tyvek?(need answers QUICK!) [Re: Anno]
#1584231 - 05/28/03 08:07 AM (17 years, 9 months ago) |
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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.
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Think for Yourself. Question Authority.
-Timothy Leary
Edited by distortion (05/28/03 08:11 AM)
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Anno
Experimenter
Registered: 06/17/99
Posts: 24,141
Loc: my room
Last seen: 1 day, 18 hours
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Re: Am I using the right kind of Tyvek? [Re: distortion]
#1584238 - 05/28/03 08:12 AM (17 years, 9 months ago) |
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grain jars: tyvek or polyfill, good
PF tek substrate with dry vermiculite layer: tyvek not needed at all.
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distortion
Registered: 12/11/02
Posts: 603
Loc: Murder Mitten
Last seen: 6 years, 5 months
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Re: Am I using the right kind of Tyvek? [Re: Anno]
#1584261 - 05/28/03 08:26 AM (17 years, 9 months ago) |
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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
--------------------
Think for Yourself. Question Authority.
-Timothy Leary
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Anno
Experimenter
Registered: 06/17/99
Posts: 24,141
Loc: my room
Last seen: 1 day, 18 hours
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Re: Am I using the right kind of Tyvek? [Re: distortion]
#1584282 - 05/28/03 08:40 AM (17 years, 9 months ago) |
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>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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Ghosty
journeyman
Registered: 12/05/02
Posts: 111
Last seen: 12 years, 11 months
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Re: Am I using the right kind of Tyvek? [Re: Anno]
#1584572 - 05/28/03 11:44 AM (17 years, 9 months ago) |
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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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-weird
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Anno
Experimenter
Registered: 06/17/99
Posts: 24,141
Loc: my room
Last seen: 1 day, 18 hours
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Re: Am I using the right kind of Tyvek? [Re: Ghosty]
#1584614 - 05/28/03 12:04 PM (17 years, 9 months ago) |
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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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