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WWorker
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Registered: 09/09/07
Posts: 395
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jar tops bulged out while PCing?
#7595893 - 11/04/07 07:08 PM (16 years, 2 months ago) |
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I just pulled a couple of sealed LC jars out of the PC and the top of one is bulged out pretty good. I haven't seen this before, but this is also the first time I have PCed a sealed jar. Did I put the lid on too tightly?
Thanks.
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legallyhomeless
mooch


Registered: 07/01/05
Posts: 4,051
Loc: EZRA for the Refuge
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Re: jar tops bulged out while PCing? [Re: WWorker]
#7595958 - 11/04/07 07:28 PM (16 years, 2 months ago) |
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it happens to me too, only with LCs though.
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SimonJester



Registered: 09/06/06
Posts: 1,076
Loc: Rocky Mountains
Last seen: 2 months, 15 days
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Re: jar tops bulged out while PCing? [Re: WWorker]
#7595959 - 11/04/07 07:28 PM (16 years, 2 months ago) |
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I'm pretty sure you're not supposed to seal the jars and pc them. They have to have some outlet for the steam. Even if its just an offset lid or small hole.
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legallyhomeless
mooch


Registered: 07/01/05
Posts: 4,051
Loc: EZRA for the Refuge
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Re: jar tops bulged out while PCing? [Re: SimonJester]
#7595963 - 11/04/07 07:28 PM (16 years, 2 months ago) |
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happens when i have 2 holes in the lid. probally from the steam. it cannot escape fast enough through the tyvek
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Optx
PronouncedAwp-Tiks


Registered: 03/28/05
Posts: 977
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Re: jar tops bulged out while PCing? [Re: WWorker]
#7595994 - 11/04/07 07:38 PM (16 years, 2 months ago) |
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better to have it bulged out than have negative pressure waiting to suck in all 10 ccs from your spore syringe.
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WWorker
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Registered: 09/09/07
Posts: 395
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Hmm...the lids have flattened back out again...makes sense.
Ok, let me change the direction of the thread now....I may have to repost this question in its own thread....
Why do people use sealed jars for LCs anyway? Why not use any of the filtration methods commonly used for grain (ie filter disks, tyvek, polyfill) and an inoculation port?
Thanks
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 11 months, 3 days
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Re: jar tops bulged out while PCing? [Re: Optx]
#7596014 - 11/04/07 07:41 PM (16 years, 2 months ago) |
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It shouldn't bulge out, regardless if it's sealed tight or not. It sounds like you're either not turning down the heat enough when pressure is reached, or popping the weight off at the end of the cycle. Either one will cause that. I PC completely sealed jars all the time with no damage. However, you must reduce heat to prevent the weight rattling, and allow the PC to cool slowly at the end of the cycle. RR
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WWorker
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Registered: 09/09/07
Posts: 395
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Re: jar tops bulged out while PCing? [Re: RogerRabbit]
#7599120 - 11/05/07 04:11 PM (16 years, 2 months ago) |
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ooops....I lifted the toggle a bit to release pressure....good detective work there
busted...
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