When you release the liquid carbon dioxide from the tank, the expansion of the liquid and the high-speed evaporation of carbon dioxide gas cools the remainder of the liquid down to the freezing point, where it turns directly into a solid.
Quick Answer. Cigars stay fresh without a humidor for up to a month when kept in their original wrapper. Cigars kept in a humidor can last for years in a properly controlled environment. A humidor keeps cigars from drying out and the oils from evaporating. Keep Learning.
It can also be confusing because different leaves can be used for different parts of the cigar. You might have one type of leaf for a filler, another leaf for a binder, and yet another tobacco leaf for a wrapper. If this was the case, you would ultimately have 3 pounds of tobacco leaf, not just one.