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OfflineBaby_Hitler
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Freeze drying mushrooms?
    #5213397 - 01/23/06 07:30 AM (18 years, 3 months ago)

Has this been done with shrooms yet?

http://www.overgrow.com/growfaq/1251


Quote:

How Do I Freeze Dry Grass?
Use a container (I use a Tupperware box) that is twice as big as the volume of grass you wish to dry. Make a few small holes in the lid, to allow the gas to escape.
Put equal volumes of bud and dry ice inside, loosely packed, with the dry ice underneath the bud. Put the lid on and make sure it is properly sealed so that the only way for gas to escape is through the holes in the lid. Put the box into a freezer, lid upwards. This is to keep the material as cold as possible, prolonging the sublimation process for as long as possible. The dry ice will begin to sublime pushing all air out of the box and surrounding your buds with bone dry co2. The totally dry atmosphere will begin drawing water molecules out of the plant material.
Check the tub after 24 hours and then every 24 hours until the dry ice has all gone. When the ice is all gone -the buds should be completely dry and smokeable. If you find that they are not quite dry then put some more dry ice into the box, place the lot back in the freezer and wait until they are done.




If not, why not?


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OfflineSeussA
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Re: Freeze drying mushrooms? [Re: Baby_Hitler]
    #5213428 - 01/23/06 07:49 AM (18 years, 3 months ago)

Freeze drying requires two things:

1) Cold
2) Partial vacuum

The above method covers 1, but does not cover 2. I suspect the above works fine for Cannabis, but will fail for mushrooms due to the diffrence in water volume.


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OfflineBaby_Hitler
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Re: Freeze drying mushrooms? [Re: Seuss]
    #5213805 - 01/23/06 11:37 AM (18 years, 3 months ago)

I think it would work, just more slowly. And I think there may be more water weight in a fresh bud than you realize. I think It's more of a question of surface area The outside of the shroom would probably freeze dry just fine, but the inside would never dry without a vacuum.

Still, it might work for some smaller specimens.

I bet when they got wet though, it would turn into the same sludge you get when you freeze and thaw mushrooms.

I'm going to see if I can get some dry ice in town today. If so I'll try it with regular store bought mushrooms.


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Re: Freeze drying mushrooms? [Re: Baby_Hitler]
    #5216685 - 01/24/06 03:41 AM (18 years, 3 months ago)

The problem with the entire setup is that the water that is extracted from the sample has no where to go except the gas space within the chamber. For something like cannabis, this isn't a problem, because it doesn't have much water to begin with. With something like a mushroom that is 90% water, it is a big problem. It may work if the water vapor freezes on the dry ice and the dry ice is kept away from the fruitbodies... but it would be very slow without reduced pressure... adding a good desicant would probably help overall, but still would not speed up the process.

A true freeze dryer has the sample on one end and a cold source on the other. As the pressure drops, the water "boils" off the sample and condenses/freezes on the cold source. Part of the benefit is the speed at which things are dried.


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