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Amazon Shop for: ½ Pint Jars, Brown Rice Flour, Vermiculite

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OfflineMadHatR
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Registered: 10/13/03
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Polyfill vs coffee filters vs tyvek envelopes
    #2142805 - 11/28/03 07:45 PM (13 years, 4 months ago)

Which is the best cheap alternative to the more than buck each filter disc and works best for keeping contams out?


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Following the rules is for dealers, knowing why the rules work is for innovators.

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Invisiblemicro
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Re: Polyfill vs coffee filters vs tyvek envelopes [Re: MadHatR]
    #2142887 - 11/28/03 08:27 PM (13 years, 4 months ago)

I can tell you, at least, coffee filters will not prevent the passing of organisms. It may prevent them, somewat, but you can't sterilize anything by passing it through a coffee filter. It should not be used as a biological filter -- only something in addition to a vermiculite barrier.

I don't use tyvek or polyfill, so I don't know about them.

--
Micro


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OfflineFuman
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Re: Polyfill vs coffee filters vs tyvek envelopes [Re: micro]
    #2143166 - 11/28/03 10:58 PM (13 years, 4 months ago)

I would vote tyvek. It is easy to use and works well enough for the layman. After using polyfill for many months, switching to tyvek was the best decision I made. I have had less contams and no noticeable difference in colonizing speed.



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OfflineSuby
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Re: Polyfill vs coffee filters vs tyvek envelopes [Re: Fuman]
    #2143345 - 11/29/03 12:43 AM (13 years, 4 months ago)

There's always some inherent risk in anything you do. whether you chose tyvek or poly I've seen them both preform well. a roll of tyvek will last you a long, long, long, time. check out anno's experiment. isn't anno the shiz-nizzle?
http://www.fungifun.org/pf/tyvek.htm


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Offlinedastats
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Re: Polyfill vs coffee filters vs tyvek envelopes [Re: Suby]
    #2143564 - 11/29/03 02:16 AM (13 years, 4 months ago)

Yes, Anno is the shiz-nizzle!!!


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Anonymous

Re: Polyfill vs coffee filters vs tyvek envelopes [Re: dastats]
    #2143660 - 11/29/03 03:08 AM (13 years, 4 months ago)

I'm using polyfil for grains so far so good....couldn't find tyvek envelopes but after using polyfil I'm kinda glad I couldn't locate them cause it works great and its cheap and easy to find.....btw coffee filters do work but I only used them for brf jars

EDIT: there was no vermiculite barrier btw I personally think they are pointless and just take up space that could have been used for substrate


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Offlineenimatpyrt
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Re: Polyfill vs coffee filters vs tyvek envelopes [Re: ]
    #2144013 - 11/29/03 11:36 AM (13 years, 4 months ago)

I started out using surgical insturmentation wrap (manufactured by 3m, designed to allow steam / gas penetration, but no any biological penetration), then went to 3 coffee filters, and now just the alum foil. if your asceptic technique is good, you don't need much.


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Offline95rh
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Registered: 05/03/03
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Re: Polyfill vs coffee filters vs tyvek envelopes [Re: enimatpyrt]
    #2146137 - 11/30/03 08:43 AM (13 years, 4 months ago)


if you're doing brf cakes they don't really need any air exchange just tape up the needle holes and incubate.

a bag of polyfil from your local craft shop will last you for a long long time.

tyvek i've only just started playing with. got 2 qts of popcorn with polyfil and 2 qts with tyvek. at 3 days niethier is showing any signs of growth, but no contams eithier so I think it really may be up in the air as to which one is preferable.

coffee filters? welp i never thought of trying them, but from what others are saying sounds like something best left alone.

my .02
rh95


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Offlinediacamomo
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Re: Polyfill vs coffee filters vs tyvek envelopes [Re: 95rh]
    #2146268 - 11/30/03 11:29 AM (13 years, 4 months ago)

tyvek works perfect...exec. gas exchange fast colon...
never got cont. witj tyvek i tried 2 times witj polyfil 2 times 1 got cont. and the colon. too slow..


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Amazon Shop for: ½ Pint Jars, Brown Rice Flour, Vermiculite

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