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OfflineSmellyhobbit
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: mijk]
    #28259466 - 04/02/23 04:34 PM (9 months, 21 days ago)

Quote:

mijk said:
So can anyone explain why the tinfoil is used the way on the pics? I get it that you will blow up the glass if you use the lid, but the steam will push off the tin/aluminium foil right? And how does the steam get into the jars with this foil covering it?



What?


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Invisibledowodenum
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: mijk]
    #28259469 - 04/02/23 04:36 PM (9 months, 21 days ago)

The foil keeps the water at the bottom of the pot, which becomes steam and condenses on the lid of the cooker, from raining down on the jar lids and getting into your filters/PF holes.

The jars don't need steam through them. They just need to hit 121 Celsius under 15 PSI pressure. Some does come from them due to the pre-hydration of grains/BRF, but it's not enough to blow foil off.

The (filtered) holes or slightly loosened unmodified lids prevent pressure from building inside the jar, and after inoculation, provide gas exchange for the mycelium.


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Invisiblemyc_ousin_vinny
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: mijk]
    #28259472 - 04/02/23 04:40 PM (9 months, 21 days ago)

Quote:

mijk said:
So can anyone explain why the tinfoil is used the way on the pics? I get it that you will blow up the glass if you use the lid, but the steam will push off the tin/aluminium foil right? And how does the steam get into the jars with this foil covering it?




I presume you are referring to the aluminum foil on top of the grain jars? This is to prevent pooling water from soaking whatever filter the lids have been modified to use. The lids are still on the jars and allow steam to enter through the filter. Unmodified lids are just cracked slightly.

Welcome to the shroomery :mushroom2:


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Offlinemijk
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: myc_ousin_vinny]
    #28259480 - 04/02/23 04:49 PM (9 months, 21 days ago)

Quote:

myc_ousin_vinny said:
Quote:

mijk said:
So can anyone explain why the tinfoil is used the way on the pics? I get it that you will blow up the glass if you use the lid, but the steam will push off the tin/aluminium foil right? And how does the steam get into the jars with this foil covering it?




I presume you are referring to the aluminum foil on top of the grain jars? This is to prevent pooling water from soaking whatever filter the lids have been modified to use. The lids are still on the jars and allow steam to enter through the filter. Unmodified lids are just cracked slightly.

Welcome to the shroomery :mushroom2:




Thanks, and thanks for your quick reply. Ye im trying to learn this, but this website is a huge load of info, so dunno where to start properly lol. I'm trying to read the "Easy AF" things and im instant hooked to this info, reading for like 2 hours now lol.

But normally when you trap air and you heat it up like this it will cause the jar to explode right? As air will expand when heated up. I'm gonna try this but dont want to destroy my new pressurecooker :laugh: I dont even know if i have the right grain, but i just gonna trial'n'error some stuff.

But great topics, really, this was the info i was searching for, for like months now, finally i found something useful, really into depth. Thanks.

Edit;
Also; why heating the grain up in jars and not separate sterilizing the grain and the jars, it seems more logical to me than putting jars into a pressurecooker. Im sure there are good reasons of which i dont know about, im new so tryin to figure out how the process works :smile:


Edited by mijk (04/02/23 05:00 PM)


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Invisibledowodenum
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: mijk]
    #28259500 - 04/02/23 05:08 PM (9 months, 21 days ago)

Quote:

mijk said:
Edit;
Also; why heating the grain up in jars and not separate sterilizing the grain and the jars, it seems more logical to me than putting jars into a pressurecooker. Im sure there are good reasons of which i dont know about, im new so tryin to figure out how the process works :smile:




How would you sterilize grains and keep them sterile until they get put into the jars? Why bother, when you could instead do both at once with the same amount of work? Pressure cookers are also called "Pressure Canners" and they're used for exactly this purpose - sterilizing full jars of veggies, fruits, and meats.

Read the tek again, and some other grain prep teks. Even watch some YT videos... The Trusted Cultivator (Munchauzen) and Stipe & Cap are good. Anyone else, I'd take with a grain of salt...

The grand picture will cohere. Don't rush into anything until it does.


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Invisiblemyc_ousin_vinny
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: dowodenum]
    #28259506 - 04/02/23 05:11 PM (9 months, 21 days ago)

The jars won’t explode. We keep them of the bottom with a trivet and put a few quarts of water in there.


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Offlinemijk
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: dowodenum]
    #28259520 - 04/02/23 05:21 PM (9 months, 21 days ago)

Quote:

dowodenum said:
The foil keeps the water at the bottom of the pot, which becomes steam and condenses on the lid of the cooker, from raining down on the jar lids and getting into your filters/PF holes.

The jars don't need steam through them. They just need to hit 121 Celsius under 15 PSI pressure. Some does come from them due to the pre-hydration of grains/BRF, but it's not enough to blow foil off.

The (filtered) holes or slightly loosened unmodified lids prevent pressure from building inside the jar, and after inoculation, provide gas exchange for the mycelium.




Ah, didnt see this one, so it is possible to use unmodified lid ? Thanks for the explanation.


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Invisibledowodenum
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: mijk]
    #28259847 - 04/02/23 10:03 PM (9 months, 21 days ago)

Quote:

mijk said:
Quote:

dowodenum said:
The foil keeps the water at the bottom of the pot, which becomes steam and condenses on the lid of the cooker, from raining down on the jar lids and getting into your filters/PF holes.

The jars don't need steam through them. They just need to hit 121 Celsius under 15 PSI pressure. Some does come from them due to the pre-hydration of grains/BRF, but it's not enough to blow foil off.

The (filtered) holes or slightly loosened unmodified lids prevent pressure from building inside the jar, and after inoculation, provide gas exchange for the mycelium.




Ah, didnt see this one, so it is possible to use unmodified lid ? Thanks for the explanation.




Some people get away with it, but I'm not a fan. They will either flip the lid in a 2-piece metal "snap lid" & ring (that typically come with the jar), or they use an aftermarket plastic lid. With either lid, they will loosen the lid a bit to allow pressure equalization during PC, and gas exchange after inoculation.

I'm not a fan because IME contams will still creep up along the thread path, especially if you don't fully re-tighten the jar lids after the PC cycle. Also with plastic, they will expand from the heat, and fully re-tightening sometimes leaves you fighting with it when it comes time to inoculate.

It could've just been my noob sterile tek making me suspect unmodified lids. But it's one more thing to think about, so I opt for either 4 layers of micropore tape over a 1/4" hole, or even better, a 1/4" hole with a synthetic filter disc between jar and lid. That way the lid can stay fully snug between loading and inoculation.


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OfflineThrowaway
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: mijk]
    #28259970 - 04/03/23 02:25 AM (9 months, 21 days ago)

Quote:

mijk said:
Ah, didnt see this one, so it is possible to use unmodified lid ? Thanks for the explanation.



I wouldn't, honestly. Modifying the lid takes two minutes to do and makes your risk drop to near 0% if handled properly. Gives you a lot of confidence when inoculating and just growing in general.

Drill at least one hole and stuff it with polyester stuffing (amazon link). You can inoculate through the polyfil. If you can add some silicone/RTV in a second drilled hole like this:



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Offlinemijk
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: Throwaway]
    #28260006 - 04/03/23 04:30 AM (9 months, 21 days ago)

Ye i figured i will, it doesnt seem that hard indeed. Now i see my pressure cooker only goes to 10PSI max, but it can turn heats up to 160degrees it says, will this be ok, or do i really need the 15PSI? Then ima check for another one.

Thanks for such helpful comments, i figured you guys mustve been answering these questions for forever by now, so thanks to take the time and explain, really helps.


Edited by mijk (04/03/23 04:30 AM)


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Invisibleiomoth
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: bodhisatta]
    #28495319 - 10/07/23 10:25 AM (3 months, 19 days ago)

many thanks


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Offlineasa-J
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: bodhisatta]
    #28577260 - 12/10/23 03:37 PM (1 month, 17 days ago)

when you are pressure cooking your oats do already have on modified lids on when you put them in the pressure cooker or do you use the lid as is? im under the impression that when you are pressure cooking your jars the lids should be on tight, but then i thought the seed itself needs to be sterile and that seems to only be achievable if i leave the lids off , cover the jars with foil,then put them in the pressure cooker. could use a little advice...


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InvisibleWay
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: asa-J]
    #28577387 - 12/10/23 04:47 PM (1 month, 17 days ago)

Quote:

asa-J said:
when you are pressure cooking your oats do already have on modified lids on when you put them in the pressure cooker or do you use the lid as is? im under the impression that when you are pressure cooking your jars the lids should be on tight, but then i thought the seed itself needs to be sterile and that seems to only be achievable if i leave the lids off , cover the jars with foil,then put them in the pressure cooker. could use a little advice...




What type of lid setup are you using?

If you are using modified lids with a hole with a filter or polyfil, keep the modified lid on tight during the pc and cover with foil.


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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: bodhisatta]
    #28588484 - 12/18/23 02:40 PM (1 month, 9 days ago)

Another great reading!


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OnlineScrewup
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: molas77] * 1
    #28588486 - 12/18/23 02:41 PM (1 month, 9 days ago)

Quote:

molas77 said:
Another great reading!



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OfflineEPIC Dave
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: bodhisatta]
    #28590205 - 12/19/23 05:34 PM (1 month, 8 days ago)

Ok... After being turned on to this site 3 years ago by my favorite Massage Therapist, and also following Bod's Easy AF methods as She recommended.
I scored my 23q presto on FB marketplace brand new in box for 65 bucks and performed the weight mod using 3 quarters and hot gluing them on i set out on my new hobby adventure.
  stating with the poly fill lid tec, followed by the oat tec then the pressure cooker tec all is going well 9 jars inoculated  now the wait for them to colonize, fingers crossed
these tec's are well written and easy AF to follow Thanks for all the info in one place...Truly Easy AF Thanks Bod...
LET THE GAMES BEGIN


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OfflineSoggyMudflaps
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: bodhisatta]
    #28602115 - 12/29/23 11:13 AM (29 days, 17 hours ago)

I’m not seeing a timeframe on here for how long to β€œcook” in the pressure cooker at 15psi. Maybe I’m overlooking it, but I’m not finding it. Please help.


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InvisibleWay
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: SoggyMudflaps]
    #28602121 - 12/29/23 11:16 AM (29 days, 17 hours ago)

Quote:

SoggyMudflaps said:
I’m not seeing a timeframe on here for how long to β€œcook” in the pressure cooker at 15psi. Maybe I’m overlooking it, but I’m not finding it. Please help.




After venting your PC for 15 minutes or so, PC quarts of grain spawn for a minimum of 90 minutes. 120 minutes is what a lot of people do for extra assurance.

If you are using bags, there is more mass to heat so you run a bit longer. I think like 180-210 minutes.


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Offlinemolas77
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Re: BOD's Easy AF how to use your pressure cooker for mycology TEK [Re: bodhisatta]
    #28612647 - 01/07/24 06:41 AM (20 days, 21 hours ago)

Great log. Did everything as described and had amazing results. thanks


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