1 cup of dry white rice on dry paper towel sheets:
Item to be protected from humidity, or maintain an ambient humidity, or dehumidified, ...is placed in an airtight plastic bag. Rice pouch is placed into the plastic bag:
Air is evacuated from the plastic bag to a nominal minimum by simply squeezing the air out and sealing the bag so that there is less air to treat. I use a food jar vacuum machine to draw air out to a nominal minimum, simply because it is easier and more thorough than trying to move air out of a bag by hand:
Enough air should remain in the bag as a passageway to carry humidity back to the rice pouch:
Rice is only a temporary measure to mitigate or remove humidity unless used in a technical manner; Since rice is organic it WILL start hosting / breeding mold / mildew after becoming moist for about a week. The drier rice remains the longer it will last; So repeating this treatment, replacing the first pouch with a fresh dry pouch, will provide that dry environment for the second pouch. Rice is NOT good for / in extended storage unless free oxygen is removed from an air-tight storage container. Rice is used professionally to dehumidify and to stabilize / maintain a prescribed ambient humidity in air-tight oxygen-free storage such as delicate documents displays.
I like to protect certain items from prolonged exposure to humidity such as shipping to unknown weather at their destination. Since we've been having spring showers I also want to make sure this guitar is nice and dry before stringing it up; A good precautionary / preventive measure. It's also a nice trick to know:
