Why is only 1 side of aluminum foil shiny?

Why is only 1 side of aluminum foil shiny?

Is there a purpose behind the two different textures? Should we be using different sides for certain reasons?.
Is there a purpose behind the two different textures? Should we be using different sides for certain reasons? .
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Aluminum Foil: Should the Shiny Side be Up or Down When Cooking?

Why Aluminum Foil Is Shiny On One Side While Dull On The Other?

Why Aluminum Foil Is Shiny on One Side

What's wrong with the aluminum foil in Vietnam? I have lived here 12 years and always wondered why some brands of foil always come out like this And if it's safe to

Matte or shiny side of aluminum foil? You don't know the difference with aluminum foil! This is why the matte or shiny side of the aluminum foil is used!

Is it Safe to Use Aluminum Foil Inside the Oven? – Megafurniture

Have you ever wondered why aluminum foil has a glossy side and a dull

Aluminum Foil: Should the Shiny Side be Up or Down When Cooking?

Why is aluminum foil shiny on one side, and not the other? - Quora

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Why aluminum foil is shiny on one side