Alufoil: which side - matt or shiny?

Hardly two users agree when it comes to the right or the wrong side of the aluminum foil. However, many simply do not care about the different sides of the aluminum foil, but use it as it comes. Here are a few tips and the reasons for the different sides of the aluminum foil.

Matte side - shiny side

Alufoil always has two different sides. But what causes disputes in some households, in the question of which is now the right page for use, has in fact only to do with the method of producing aluminum foil.

Since production should be as efficient as possible, two layers of aluminum foil are rolled together. After the last Walzgang so only one side of the film with the roller itself has come into contact. Only this page is also shiny when the aluminum foil is wrapped on the cardboard roll on which we buy the film in the store.

  • Surface is production-dependent
  • two layers in the last Walzgang
  • only one side in contact with metal roller
  • when separating the layers, therefore, two different sides
Coated foil

There are also rumors circulating that the aluminum foil would be coated on one side and thus look different. These rumors are, as you can see from the above description, complete nonsense. Only aluminum beverage cans are coated on the inside. Otherwise, the carbon dioxide would eat through the can during storage.

Which side keeps you warm

Although the two sides look a bit different only by the method of production, the glossy side reflects the heat slightly better than the dull side. But that is really only a minimal difference that can hardly be measured.

Many users also have the impression that the glossy side does not stick so hard when something is baked in it. Since the smooth glossy side is a little bit more even, this impression could be correct and bring an actual benefit.

  • shiny surfaces reflect better
  • Food does not stick easily on smooth surfaces

Cooling food

If you want to keep something cool, you should of course place the glossy side on the outside, of course. Sun rays and heat are thrown back better so that the food stays cool inside.

Tips & Tricks

Many test reports criticize too high a proportion of aluminum, which has passed into the food during the tests. But most of the tests involved wrapping food that was not suitable for aluminum foil anyway. All acidic and salty foods should not be wrapped in aluminum foil. Likewise, pineapple and apples are not in aluminum foil because they contain high levels of acidity. A grapefruit is certainly not in aluminum foil. As long as you follow these rules, aluminum foil is quite safe.

Video Board: Aluminium Foil, which side up? Shiny IN or OUT? - Warren Nash