https://www.hunker.com/2028509/which-side-aluminum-foil-use-shiny-dull/
Have You Been Using Aluminum Foil Wrong? Here's The Truth About Its Shiny & Dull Sides
Nov 23, 2025 - Some people say the different sides reflect heat differently, but both sides of aluminum foil typically work the same unless the foil has a nonstick coating.
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https://www.slurrp.com/photo-stories/using-aluminum-foil-in-kitchen-keep-these-tips-handy-1684763655131
Using Aluminum Foil In Kitchen? Keep These Tips Handy
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