Moisture

• To properly pop, kernels must have a moisture content of 13.5 to 14 percent. If raw popcorn is left exposed for one day in warm temperatures, it can lose one percent of moisture; this will result in more half-popped or unpopped kernels. Popcorn that has lost three percent or more of its dampness will normally not pop.

Best Storage Methods

• Glass or plastic vessels with tight fitting lids are best for popcorn storage. Store the containers should be stored in a cool place, away from sunlight and the stove.

Myths

• The idea that popcorn keeps best in a refrigerator or freezer is not valid. These storage options actually tend to dry out the kernels more than room temperature storage.

Fun Fact

• Since it seems wasteful to discard the unpopped kernels often found at the bottom of the popcorn bowl, you can still try to pop the so-called "old maids." Place these kernels in a jar, and add just enough water to barely moisten their surfaces. Shake the jar and let them sit for a few days; this will rehydrate them. Rehydrated kernels will often pop as well as fresh popcorn.