Thing of it is, a canning jar is tempered glass. Made to withstand up to 400 plus degrees of heat. The thing to watch for is pressure. So do dry bud in the jar, not wet bud or leaf. Done alot of research the last few days online. There wont be any explosion…a crack in the glass. And any pressure would be when cooling. So putting it in a covered pan while cooling would help keep and glass from going anywhere. And like I said…no explosion just cracks. Its tempered glass.
And if you are using dried bud, there would be not much outgoing pressure other than the moisture in the air inside. So pressure is what opens the seal fo force moisture out to create the vacumn inside. That is why there is little smell using the jar.
Having the jar in boiling water only heats it to the temp of the water, not to the temp of the oven or container.
Now another method of doing it is in pressure sealed bags. If you have a vacumn sealer you can use it to seal your bud inside and boil it in water for like 1.5 hours at 200 degrees. You have to make sure it sinks into the water. The guy I read this from used a couple of butter knifes to add weight to his bag to sink it. The knives were sealed seperately from the bud so nothing would transfer to the bud from the knives.
In otherwords, seal your bud…leave enough bag to put your knifes or spoons in, then seal the bag again…use a couple of seals…then heat your water, drop the bag into the water and let it boil. He used a 12 qt pot, but the size is up to you. This is the chart he made with tests made by a lab showing how much TCH was freed by this method…using different methods. This was at 200 degrees water temp. This is what he used to heat his water to precise temp.
Cannabinoids #1 (no decarb) #2 (1 hour decarb) #3 (1:40 decarb)
THCA 12.2% 1.44% 0%
THC 3.37% 8.9% 9.37%
Total THC* 14.07% 10.16% 9.37%
Total THC Adjusted 14.14% 10.31% 9.78%
I cant show the link to his article, but google the title: Decarboxylation: Marijuana Alchemy
You can read the whole report.and his method.
Now, I cant afford nor you guys likely his heating method, but a stove top or whatever to the temp or above even will work I am sure. Worth trying if you are worried about using a jar. The thing about a jar is that it can tip on its side in the pot and more than one jar they can bang against each other and crack. Unless you have a canning pot and the jar rack that comes with it. I do as it happens so guess I can try it and see what goes. Cant hurt I guess. My wife got half gallon size canning jars. maybe too big but least they are canning jars.