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.
Once you have rolled your cigars, the general rule of thumb is 1 week out, 2 weeks in. What this means is that after you have hand rolled your cigars, the leaf and your cigar will usually be noticeably moist. If you were to transfer these directly to your humidor, there would be opportunities for mold to grow.