Why Aluminum Foil Has a Dull Side and a Shiny Side - Reynolds Aluminum Foil Wrap

Consider the mystery solved.
According to Reynold's Kitchen, the difference between the two sides of aluminum foil is just a result of manufacturing.

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Reynolds Wrap Non-Stick Foil features a special food-safe non-stick coating that makes this trusted aluminum foil perfect for lining pans and foil packet cooking when you’re dealing with sticky foods. There is no need to spray or oil your pans when you use this non-stick baking foil. Simply place food on the non-stick side of the foil, which is dull in appearance, and enjoy the benefits of non-stick cooking.

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Replying to @gabrieme20 PSA, the dull side is the non-stick side of fo

Why Aluminum Foil Has a Dull Side and a Shiny Side - Reynolds Aluminum Foil Wrap

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