Curing in Mason Jars with Tyvek?
I think this might work to a degree... but keeping in mind that the tyvek material is meant to breath in one direction only - the only way gases will escape the jar is if the air pressure inside the jar increases as the chlorophyll breaks down. I;m not sure if it would or not... it should marginally, but I;m not sure if it would be enough to really make a difference.
But basically you need that air pressure increase to push the gas through the Tyvek, just because it 'can' pass through the Tyvek, doesn;t mean it 'will' ;) If air pressure inside the jar is equal to the air pressure outside the jar and there is no way for fresh air to enter the container, then the gas will not be able to escape the jar. The outside air pressure will basically hold it in.
Curing in Mason Jars with Tyvek?
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Originally Posted by syde00
I think this might work to a degree... but keeping in mind that the tyvek material is meant to breath in one direction only - the only way gases will escape the jar is if the air pressure inside the jar increases as the chlorophyll breaks down. I;m not sure if it would or not... it should marginally, but I;m not sure if it would be enough to really make a difference.
But basically you need that air pressure increase to push the gas through the Tyvek, just because it 'can' pass through the Tyvek, doesn;t mean it 'will' ;) If air pressure inside the jar is equal to the air pressure outside the jar and there is no way for fresh air to enter the container, then the gas will not be able to escape the jar. The outside air pressure will basically hold it in.
I'm confident when I say that the gas exchange does not work the way you describe. At least not when involving a glass jar and a room. Oddly enough though what you described mimics how high pressure weather systems work (kind of).
Tyvek does not need air pressure to push gas through anything. Your house is covered by insulation, brick, siding, mortar, wood frame etc etc.. more importantly your entire house is wrapped in a layer of.... TYVEK. Your house is not perfectly sealed nor is there 'forced' air pushing against it since it's beneath several layers of your houses exterior.
Gases will rise and fall based on their density; ie co2 is much more dense than oxygen and thus will actually settle on the bottom of a contained area rather than rise. Water vapor on the other hand rises.. and with water vapor chlorophyll will leave plant material also.
The differences in pressure have nothing to do with exchanging gas. If what you said were true then everyone who just simply took the lids off their jars for 30 minutes twice a day would be smoking some shitty non potent bud.
Pressure differences would actually most likely result in damaging the jar. Have you ever put a mason jar in a pot of hot/simmeringwater only to have the bottom glass part come apart from underneath it when you pull the jar out of the hot/simmering water? Contrary to what people might believe the reason the jar breaks is because you are introducing a difference in pressure. Inside the pot of water the pressure is equalized on the outside and the inside; allowing for the jar to remain safe. However when you pull it out of the water you create an instantaneous difference in pressure from the outside. The pressure in the jar is much greater from being heated and the pressure of ambient air is far less causing the glass to push itself out from the inside out. The breaking of the jar has nothing to do with temps.
Only trial and error will see but I am certain it does not work the way you claim.
Thanks though, appreciate the effort.
ps: I went through great effort to clean up my post to not seem derrogatory. If it seemed that way then I apologize. I am not talking down to you; I am just blunt and it often comes across to people that way.
Curing in Mason Jars with Tyvek?
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Originally Posted by daihashi
The breaking of the jar has nothing to do with temps.
aren't the temps responsible for the difference in pressure?
is your new hobby mycology? that's a pretty interesting hobby.
if so, isn't gas exchange necessary in mycology? won't stale air cause your cake to be slow colonizing or not to colonize at all? the tyvek is just used to keep the moisture out of your cakes while your pressure cook them. so the moisture content of the cake isn't messed with. (it's been a while since i read up on this stuff!)
-shake
Curing in Mason Jars with Tyvek?
Quote:
Originally Posted by headshake
aren't the temps responsible for the difference in pressure?
-shake
Well yes; obviously. But the breaking is not due to the temps directly; it's due to the pressure difference. The temps created an increase in pressure. You could recreate the exact same situation without heat in a lab setting but I thought I would cite a real life situation a few of us may be familiar with instead.
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is your new hobby mycology? that's a pretty interesting hobby.
Indeed it is my new hobby. It's pretty interesting and it's sort've like instant gratification. Mushrooms of all kinds seem to grow very quickly and it's fun to watch.
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if so, isn't gas exchange necessary in mycology? won't stale air cause your cake to be slow colonizing or not to colonize at all? the tyvek is just used to keep the moisture out of your cakes while your pressure cook them. so the moisture content of the cake isn't messed with. (it's been a while since i read up on this stuff!)
yes and no.
Gas exchange speeds up the colonization of the spawn subtrate. Mycelium are like humans; they breath Oxygen and release CO2. CO2 inhibits the growth of Mycelium but it will still grow at an extreme crawl. Think of trying to grow cannabis in a tent with temps that are 95 degrees.
This is all relative to just Mycelium and not the actual technique used to create them. What you described is BRF Cake or a PFtek Cake. In those situations there is not really gas exchange to speak of because you pack the entire jar full of vermuculite and brown rice flour. However just because that is the technique does not mean it has anything to do with the mycelium growth process.
Many experienced mycology hobbyists will spawn to grain instead of BRF. The reason being is that 1 it colonizes faster (due to the gas exchange through the tyvek filter and because the mycelium can move around freely to spread faster) which allows less time for contamination in your substrate.
Here is what Tyvek is used for in Mycology:
*Keeps environment free of contaminants.
*Allows for gas exchange.
*Does not freely allow air into the environment
*helps to retain humidity levels.
It is also important to note that for the most part tyvek is only used to innoculate grains when they are in their jars. Once you put them into fruiting chamber your ventilation holes will be covered with polyfill instead of tyvek. Reason being is that polyfill keeps out contaminants/spores/etc etc... allows for gas exchange, helps retain humidity levels but most importantly allows fresh air in; unlike Tyvek.
I don't want to post links but if you do a search for tyvek and gas exchange you're sure to come up with some hits that will give you more insight into tyvek and I guess mycology (they seem closely linked).
Polyfill wouldn't work well for curing cannabis but Tyvek would be nice since it helps keep air out while allowing gas exchange.
Curing in Mason Jars with Tyvek?
I was milling around and stumbled on your thread. Tyvek (pronounced /taɪˈvɛk/) is a brand of flashspun high-density polyethylene fibers.... the gas that is created when the plant matter is decomposing and curing and stuff is ethylene gas I think, would the ethylene gas react with polyethylene fibers in some way? maybe bond to it or something...
Curing in Mason Jars with Tyvek?
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Originally Posted by daihashi
lol.. I wish you had the slightest idea. And I'm back but definitely not an active member. The situation revolving around the forums from when I left previously has still left a bad taste in my mouth but I'm coming around.
Will probably never do another grow log again but it doesn't mean I can't talk and exchange ideas right? :hippy:
what happened? should i not do a grow log?
sorry i dont know anything about the Tyvek and sorry for getting off topic
Curing in Mason Jars with Tyvek?
Interesting idea, but what's wrong with curing in a glass jar the traditional way? Been working for generations just fine. I guess a few side-by-side's are the best way to assess the theory. :thumbsup:
Depending on the porosity of the Tyvek, and it's intended application...if the gas vapors can escape, I'd think the water vapors could, too. Would this dry the buds rather than cure them?
If the theory is that this keeps the moisture in, but gas escapes...I don't see a benefit to having to dick with the Tyvek, rather than opening the jars a couple of times a day. If not removing the humidity in the jar daily, you risk a very quick case of mold. And having to physically open the jars gives you an opportunity to inspect the buds anyway.
By the way...those Debbie Meyers green bags are an interesting concept too. (according to my wife, who bought some) Problem is...they don't work either in the fridge, or on the counter. But they are easier to spot in the fridge, lol. :jointsmile:
Curing in Mason Jars with Tyvek?
Everytime a person turns on a heater or ac unit in their home it causes positive pressure to build in the home. In the case of heat the moisture builds in the wall cavity as well as cold air returns. So Yes, there can be pressure pushing the moisture out. More accurately the + pressure pushes the air which condenses moisture on the cooler tyvek which usually wicks the moisture out. I have seen a super tight exterior paint job trap the moisture between the outer wall and the sub siding wrap. Tyvek becomes a rot assistant in that case.
As to the original question....I don't know. :D Have you thought about just trying it? What about Gore-Tec or whatever that shoe material is?
Curing in Mason Jars with Tyvek?
somebody that has a harvest coming up, try it and let us know how it works out.
:thumbsup:
