Why is one side shiny and other side dull? Does it have a coating or something?
Which side should be used to touch the food? And which side should be outside ?
In: 2
The shiny and dull sides are simply a result of the manufacturing process. The foil gets squeezed between two giant metal rollers to press it thin. In order for more output the factories roll two spools of the thick foil between the rollers at once. The side pressed against the rollers is smoother and shiny. The side pressed against the other foil isn’t as shiny because the foil is already a rougher surface. So it isn’t an intentional or functional choice in manufacturing. It’s just a result of the process.
TL;DR it serves no function and is merely a result of the manufacturing process. Ignore it entirely when cooking.
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