If you're willing to bake some bread or cookies when you have time, I think you'll use it a lot, but sometimes we wonder why does aluminum foil have a shiny side and a dull side? What's the difference between them? Do any of them have any special function? Which side should we use to get the best results?
Why does aluminum foil have a shiny side and a dull side? The dull side is due to the production process. We are often told that the dull side is a better conductor because it is said to have a flatter surface. On the other hand, some say that the shiny side retains more heat, which makes your meat or fish crispier when baked in the oven. Facts have proved that this is all guessed by everyone, not true! In fact, the shiny side and dull side of aluminum foil have no special function at all. Purely due to the production process, aluminum foil produces a shiny side and a dull side
. Yes, it's really that simple.
The production process "Aluminum foil is 'milled' into multiple layers during the production process," explains the aluminum foil manufacturer. Milling is a process in which the foil is stretched to the desired thickness by applying heat and tension. We grind two layers that are in contact with each other at the same time, because if they don't touch, the aluminum foil will break during the grinding process. Where the aluminum foil is in contact with the other layer is the "dark" side. The "glossy" side is the milled side that is not in contact with another sheet of metal. That is the reason why does aluminum foil have a shiny side and a dull side. Regardless of which side is used, the properties of aluminum foil are the same. You don't have to worry about it anymore, you can use it however you want, because there is no difference between the two sides.