Is air space necessary? If so, how much? And can I cram as much in the jar as possible?
I think it depends on how much you are putting away. I've probably got over 200 lbs of bulk in the cellar. Space matters, I put in as much as I can make fit. If I were storing 20 lbs, is probably leave a bit more space if for no reason other than keeping the flakes intact.
Is air space necessary? If so, how much? And can I cram as much in the jar as possible?
Thanks for the info. Up to now I've just bought what I needed. The writing on the wall tells me I need to stockpile!I use 1/2 pint Mason/Kerr wide mouth jars for canning bulk tobaccos. I weigh out the bulk prior to jarring.
I cram 4 oz. of most flakes into a jar & leave a small amount of air at the top.
For other tobacco cuts the 1/2 pint jars hold 2 oz. perfectly. If necessary I'll use a canning funnel & double-sided espresso tamper to aid in jarring certain cuts. This still leaves a small amount of air at the top.
For plugs it depends on the size of the plug. I don't worry about how much air sits around the plug.
The oldest bulk blends I have jarred are from ~2004/2005 & they've aged beautifully so far.
Over the many years I've read different postings, some of them from pros, I've come to the conclusion that nobody actually knows what the best way is to age tobaccos or what really goes on during the "aging" process. Tobacco gets shut away in one fashion or another, for however long, until pulled forth to be packed in a pipe and immolated.A theory on aging is that you need both aerobic and anaerobic conditions, but mostly anaerobic. So you want an airtight seal, with as little O2 as possible. One theory.