carbon dioxide generation for bean storage

[shadow7454]

9.3 bags of coffee per month! No wonder you don't care about storage, you're not storing anything. I might not even get through 2 complete bags in a month. It's also why these storage trials and coffee reviews move slowly.

Just to sanity check, is that 7 lbs. before or after roasting? I'd expect roasted coffee to be a lot lighter.

Currently have around 95 lbs of green as I tend to order in bulk to save on per lb and shipping. Taken to a full city range I lose around 17%. So roasting 10-11 lbs monthly yields 8.5 lbs give or take as some variation in origin, process method, etc. I buy 30-40 lbs at a time and rotate stock so nothing just sits unused. If stored in a decent manner green from tree to cup has at least a few yrs shelf life with no real drop in quality. I know firsthand after having a large bag for about 18 months before finishing it and that last batch was as good as the first.

 

[bvanevery73]

It fits! and... it pulls easily out of the mouth of the jar! That's because the mouth of the metal lid, is only barely smaller than the mouth of the glass jar. Without a horizontal component, this accomplishes nothing. It's gotten me in touch with the very precise geometry of the glass and metal though. Better luck tomorrow, I've had it for today.

Further disadvantages of using a plastic peanut jar with the metal Mason jar lid. The plastic is futzy to put in and take out of the metal ring. It requires strong bending, and sooner or later that plastic is going to break from the bending. To the extent it's a precision cut piece of plastic, that's labor that will have to be done all over again.

A better insert would match the shape of the lid, and the metal ring would pass easily over it, from the unsecured side. Perhaps such an insert could be plastic welded from peanut jar lids, but I haven't thought seriously about it yet.

I'm wondering about filling the small bags one at a time in a large volume of CO2, rather than trying to do them all at once. Making some kind of spreading, filling, and closing tool, that can reach down into a CO2 filled area.

Taller jars are available. They just cost money. My 32 fl. oz. jars are worth approximately $7.50 each. Even more annoyingly, they're often sold in sets of 4, so the outlay is $30. Ain't gonna happen during prototyping. That's quite spendy for something that's not obviously the solution to a problem.