Its time to dig into one of the kitchens biggest mysteries.
Aluminum foil is an indispensable item in nearly every household.
It’s versatile: it’s possible for you to use it for everything fromfoil packet recipestocleaning your grill.

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The handy product comes equipped with a bit of a mystery, too.
One side of a sheet of aluminum foil is shiny, and the other side is dull and flat.
Before you tear off another sheet, here’s what you’re gonna wanna know.
Why Is Aluminum Foil Shiny on One Side?
One is so shiny that you might practically use it as a mirror.
The other, well, it’s still silver but not nearly as sparkly.
It turns out there’s a good reason.
According toReynolds Wrap, the difference is a byproduct of the manufacturing process.
You see, aluminum foil is milled in different layers.
The factory manufactures two sheets of metal simultaneously to ensure the sheets are strong enough to withstand breakage.
Does the Shiny Side of Aluminum Foil Reflect More Heat?
Aluminum foil reflects heat from both its dull and shiny sides equally.
Should You Use Aluminum Foil with the Shiny Side Up or Down?
Quite simply, it doesn’t matter what side of aluminum folk you use.
Since the exact same material makes up both sides, they will perform precisely the same way.
The only difference is aesthetic.
So feel free to work both ways.
In the end, your food will cook the same.