Jay, I find that if I soak myself with scotch I completely forget all about what the humidity of my tobacco is. :lol:
On the other hand, I've been using Ball/Mason canning jars in various sizes to store my tobacco in for years. I have opened a jar that I was aging after over 2 years, and after I unscrewed the ring, I had to pry the top off because it had sealed itself quite well, and the tobacco was just fine. I try not to leave more air than I have to in the jar, but I believe that the humidity of the air in the jar when you screw down the lid may have some affect on the tobacco, but not much. I figure that the air in the jar will absorb the humidity out of the tobacco up till is has the same humidity level as the tobacco. If for some reason the air kept on absorbing the humidity out of the tobacco, it would seem that you would see condensation on the inside of the jar. I have never experienced this and as long as the jars are sealed well, the tobacco I take out always seems to be at the humidity level when I sealed it. If you are opening and closing the jar to use any tobacco, and the outside air is very dry, the tobacco will probably lose some humidity over time.
I may be off my rocker here, because I have no formal physics training, I'm only going by my own experiences over the years.
On the other hand, I've been using Ball/Mason canning jars in various sizes to store my tobacco in for years. I have opened a jar that I was aging after over 2 years, and after I unscrewed the ring, I had to pry the top off because it had sealed itself quite well, and the tobacco was just fine. I try not to leave more air than I have to in the jar, but I believe that the humidity of the air in the jar when you screw down the lid may have some affect on the tobacco, but not much. I figure that the air in the jar will absorb the humidity out of the tobacco up till is has the same humidity level as the tobacco. If for some reason the air kept on absorbing the humidity out of the tobacco, it would seem that you would see condensation on the inside of the jar. I have never experienced this and as long as the jars are sealed well, the tobacco I take out always seems to be at the humidity level when I sealed it. If you are opening and closing the jar to use any tobacco, and the outside air is very dry, the tobacco will probably lose some humidity over time.
I may be off my rocker here, because I have no formal physics training, I'm only going by my own experiences over the years.