About 2 months ago I stocked up on some of my favorite bulk blends. After distributing it among my Ball half-pint canning jars (with flats and rings), I placed it in my cellaring room that stays about 72F degrees year-round. Recently, I've been hearing the jars "pop" as the jar "cans" itself.
Is this normal? I'm assuming the air in the jar is being consumed by the aging process so it is drawing somewhat of a vacuum?
Is this normal? I'm assuming the air in the jar is being consumed by the aging process so it is drawing somewhat of a vacuum?