Question

Why does aluminum foil appear to have two different shades of silver?

Answer 1

one side is more reflective, promoting "crisping" it it against the food. the other side achieves the opposite. Check out the Alcan website for more info.

Answer 2

The dull side is less reflective. You are supposed to use this side facing out when you cook, that way you don't see the disappointment in your face when your recipe doesn't come out right.

Answer 3

i think it is because one is polished and the other is not or something like that

Answer 4

shiny side, dull side.. . Its not as easy to polish both sides.

Answer 5

Foil is shiny on only one side because as it passes through the final foil mill, two thicknesses of foil are rolled together. The sides facing each other emerge with the dull finish, while the sides in contact with the foil mills come out shinier – due to the burnishing effect of the rollers. . http://www.aluminum.org/Content/NavigationMenu/The_Industry/-Foil/Foil.htm

Answer 6

it's the machining process - according to reynold's wrap the sides don't really make a difference except with their non-stick "Release" foil.

Answer 7

because it does

Answer 8

THEIR DIFFERENT!

Answer 9

im really not scientifically certain about this, but i learned while cooking that the shiny side reflects heat and the dull side absorbs heat. therefore when baking, say a potato for instance, you'd wrap the shiny side inside and the dull side out. uhmm...actually, according the reynold's wrap it doesnt really matter what side you cook it on. nevermind.

Answer 10

its because of the way it is manufactured in the factory. Both do exactly the same but during making. one side comes into contact with the rolling mill used for determining the thickness. If it worries you - use clingfilm for your sandwiches !