Quick Answer
Yes, you can safely store oils in Mylar bags for the long term, but proper preparation and storage are crucial.
Selecting the Right Mylar Bag
When choosing a Mylar bag for oil storage, make sure it’s specifically designed for food-grade applications. Look for bags with a food-grade liner, typically made from low-density polyethylene (LDPE) or polypropylene (PP). Ensure the bag is also BPA-free and meets Federal Regulations (21 CFR) for food contact.
Preparing the Oil and Bag
Before filling the Mylar bag, degas and dry the oil by allowing it to sit for 24-48 hours. This process removes air bubbles and moisture, which can affect the oil’s shelf life. Then, use a food-grade oxygen absorber, such as silica gel or calcium chloride, to absorb any remaining oxygen in the bag. The recommended ratio for oil to absorber is 1:100 (one absorber per 100 grams of oil).
Sealing and Storage
Seal the Mylar bag using a heat sealer or a flame sealer, ensuring the bag is completely airtight. Store the sealed bag in a cool, dry place, away from direct sunlight and heat sources. The ideal storage temperature for oil is between 60°F and 70°F (15°C and 21°C). Regularly check the bag for signs of degradation, such as swelling or oil leakage, and replace the absorber as needed.
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