You’ve probably noticed that aluminum foil has both a shiny and dull side, but have you ever wondered if they’re different for a reason?
The truth is, it doesn’t matter which side of the aluminum foil you use. When it’s manufactured, it undergoes a process called milling, during which heat and tension are applied as it’s stretched and shaped into foil. To prevent it from breaking while this happens, two layers of foil are pressed together and milled at the same time.
According to Reynolds, the side where the foil is touching another layer becomes dull (the shiny side is the one without a second piece on top). Whether it’s shiny or not, though, there’s no difference in how each side of the foil works once it’s packaged and in your kitchen.
The only exception is nonstick foil—the dull side is typically the nonsticky one.
While the foil itself might not have any secrets, its packaging does. A TikTok content creator recently went viral after showcasing how to keep the roll of foil inside the packaging (the method has been there all along).
Speaking of packaging, here’s why there are multicolored circles on your bag of chips.
[Via Family Handyman]