I'm trying to find out if I can stack jars that I've canned. Will it compromise the seal if a box of jars is stacked on top of another? I'm using the canning jar boxes, so they only come half way up the jars. The weight would be directly on top of the jars, but evenly distributed. If it's OK to stack them, how many can be stacked without damaging the seals of those on the lower levels?

I've searched the forums and links but can't find an answer to this.

B~