Years ago i ran across a study (Norwegian, as I recall) that showed a jar lid only had to be tightened to 9 newtons (about 2 pounds) to be fully effective. I can’t find it at the moment, but we could use a similar study. Maybe companies would get some sense and stop tightening jar lids so tightly that they can’t be removed without explosives.
Years ago i ran across a study (Norwegian, as I recall) that showed a jar lid only had to be tightened to 9 newtons (about 2 pounds) to be fully effective. I can’t find it at the moment, but we could use a similar study. Maybe companies would get some sense and stop tightening jar lids so tightly that they can’t be removed without explosives.