Quote Originally Posted by Zeede View Post
My biggest concern in shipping is the large amount of temperature fluctuations that can occur.
It is not the temperature fluctuations that cause the problems per se. It is the resulting rapid fluctuations in relative humidity as a result of the temp fluctuations that cause the problems.
So, still rapid temp changes can be a problem. The relative humidity is dependent upon temperature. Cool too rapidly ==> condensation. Heat too quickly ==> drying. These rapid changes then are what can cause the tobacco to swell/shrink and lead to damage of the wrappers.