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Caribou_Lou
Stranger

Registered: 10/17/07
Posts: 2,510
Loc: Never Land
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Pasteurizing Casing Mix
#7531143 - 10/18/07 12:48 PM (16 years, 3 months ago) |
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I did some searching and found out I should pasteurize the casing mix by putting it in jars and then into my PC with water up to 3/4 of the sides of the jars and letting it boil for awhile without the weight on. My question is how should I cover the jars, should I use the two piece lid, or would a couple layers of foil be enough?
Edited by Caribou_Lou (10/18/07 12:53 PM)
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HappyHardcore
Shroomery Jester



Registered: 11/06/05
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Re: Pasteurizing Casing Mix [Re: Caribou_Lou]
#7531206 - 10/18/07 01:10 PM (16 years, 3 months ago) |
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Just go with the usual lid and ring with foil wrapped tightly around the top. If you want, put a layer under the lid and/or a double layer over the lid and ring. I always double layer due to and incident where all my jars got completely water logged with only 1 inch of water in the PC.
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RogerRabbit
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Registered: 03/26/03
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I just use foil over the open jar with no lid at all. All you're trying to do is keep water from dripping into the jar during the process. It doesn't need to be sealed tightly. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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monstermitch
Growing in Bags Doesn't Work



Registered: 02/10/06
Posts: 3,911
Loc: Arizona Bay
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Re: Pasteurizing Casing Mix [Re: RogerRabbit]
#7531225 - 10/18/07 01:17 PM (16 years, 3 months ago) |
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using just foil works great. or using the lids as they came with the jars works great.
the lid setup is not important in this process.
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denots87
Shroomerite



Registered: 11/17/06
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Re: Pasteurizing Casing Mix [Re: monstermitch]
#7532610 - 10/18/07 06:52 PM (16 years, 3 months ago) |
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If you do use lids and the bands that came with your jars, remember to keep them a tad bit lose. Sealed airtight containers+heat = recipe for a bad day (exploding glass jars).
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monstermitch
Growing in Bags Doesn't Work



Registered: 02/10/06
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Loc: Arizona Bay
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Re: Pasteurizing Casing Mix [Re: denots87]
#7532736 - 10/18/07 07:22 PM (16 years, 3 months ago) |
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Quote:
denots87 said: If you do use lids and the bands that came with your jars, remember to keep them a tad bit lose. Sealed airtight containers+heat = recipe for a bad day (exploding glass jars).

yeah, that's pretty funny.
ever heard of canning??
I seal them. yes, it creates a vacuum in the jar. which poses no problem. it keeps the water out and keeps the right amount of moisture inside. Mission accomplished.
Sealed jars do NOT explode...
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BigDD
Stranger ThanMost



Registered: 10/05/07
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Re: Pasteurizing Casing Mix [Re: monstermitch]
#7533887 - 10/19/07 01:46 AM (16 years, 3 months ago) |
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I do believe however that "tightly" sealed jars have a propensity to crack. In every canning book for "regular foods" it says to screw on the lid until it just seals the rubber ring on the glass jar. This allows expanding gasses to escape from the jar as the contents heat up. Upon cooling a partial vacuum is created within the jar, pulling the rubber seal against the glass, creating an ever tightening seal as it continues to cool. When canning "regular foods", it is not necessary to re-tighten the jars when cooled, as they are already sealed by this vacuum.
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figgusfiddus
Arrogant Worm


Registered: 02/02/07
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Re: Pasteurizing Casing Mix [Re: Caribou_Lou]
#7533903 - 10/19/07 01:59 AM (16 years, 3 months ago) |
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Quote:
Caribou_Lou said: I did some searching and found out I should pasteurize the casing mix by putting it in jars and then into my PC with water up to 3/4 of the sides of the jars and letting it boil for awhile without the weight on. My question is how should I cover the jars, should I use the two piece lid, or would a couple layers of foil be enough?
I'm a little confused as to why no one said this yet, but pasteurization does not occur at boiling temps. Anything I choose to pasteurize--straw, dung, casing--goes in a 175F bath for 60-90min (don't start counting until it hits that temp internally, use a candy thermometer).
Even if your jars aren't hitting 212F internally, they're going to be all over the place. I don't like the idea of sterilizing my casing. Admittedly, I'm not a casing master or anything, since I have taken to straw lately and grow lovely monsters from it without a casing, but I am too afraid of trich to sterilize anything I can possibly pasteurize. Trich is the enemy. It haunts my dreams, and steals all of my third flushes.
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figgusfiddus
Arrogant Worm


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Re: Pasteurizing Casing Mix [Re: monstermitch]
#7533910 - 10/19/07 02:02 AM (16 years, 3 months ago) |
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Quote:
denots87 said: Sealed jars do NOT explode...
I could be wrong about this--I don't know the max strain you can put on a Ball jar--but sealed jars do not explode inside a pressure cooker. PCs equalize internal and external pressures, give or take. A stock pot won't. Boil a sealed jar in a pot and the last thing you see may be some very mobile and pointy shards of glass.
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monstermitch
Growing in Bags Doesn't Work



Registered: 02/10/06
Posts: 3,911
Loc: Arizona Bay
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Re: Pasteurizing Casing Mix [Re: figgusfiddus]
#7534533 - 10/19/07 08:54 AM (16 years, 3 months ago) |
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you have no idea what you are talking about. I've pasteurized hundreds or thousands of jars of casing this way. no jar has every exploded, no jar has ever cracked. I seal them tightly.
the tek I use and follow does Not bring the internal temp of the casing above 160 degrees. it keeps it between 140 and 160, exactly as it should. I know this because I use temperature probes.
you use nothing. you don't even experiment. you don't even know what you're talking about. you're shooting down a wonderful tek with poor information that isn't even true. It's just your irrational fears.
why don't you try it before you start complaining?
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
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Re: Pasteurizing Casing Mix [Re: monstermitch]
#7534551 - 10/19/07 09:02 AM (16 years, 3 months ago) |
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You must remember that glass is an insulator. The temperature inside the center of the substrate in a jar is still not much over room temperature when the water surrounding it begins to boil. That's why we bring the water to a full boil when our substrate or casing material is being heat treated in jars.
Sealed jars do not explode in a pressure cooker unless somebody does something dumb like release pressure at the end of the cycle instead of letting the unit cool slowly and naturally.
A kettle of boiling water will not exceed 212F/100C, thus no steam pressure is developed within the jar. There may be a bit of air pressure as the contents expand, but not nearly enough to ruin the jars. I've used the above described method thousands of times, so this isn't a theory, it's fact. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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denots87
Shroomerite



Registered: 11/17/06
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Re: Pasteurizing Casing Mix [Re: RogerRabbit]
#7544697 - 10/21/07 09:21 PM (16 years, 3 months ago) |
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Oops was being highly stupid and baked and posting. My bad for mis information and those who corrected me.
Potsy
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