Which Side Of Aluminium Foil Should Touch Food

Aluminium foil is aluminium prepared in thin metal laminates. Approximately 75% of aluminium foil is used for packaging of foods, cosmetics, and chemical products.

When aluminium foil is used for wrapping or cooking food, most people will struggle to choose which side of aluminum foil sheet to use.

Because of the manufacturing process, most of aluminum foil roll is with one bright side and one matte side. There is only a small difference between the two, and there is not much difference in daily life.

But if you really want to get a better effect, there are two tips for you. The reflectance of the dull side is 80% 3.jpgand that of the shiny side is 88%, so you had better use the shiny side to wrap food, which will speed up cooking.

If you only store food in aluminum foil, the better way is to use the dull side to wrap food for some food may stick to the shiny side.

There is also another aluminum foil paper, of which both sides are shiny. During single sheet rolling, the upper and lower surfaces of the aluminum foil are in contact with the rolls, and both sides have a bright metallic luster. If you buy this aluminium foil wrap, you won't have choice difficulties.

How is Aluminum Foil Made?

Since I already mentioned the manufacture of foil through the explanations given above, I may as well write a bit more about how foil is made.

The manufacture of aluminum foil is similar to making pasta at home. A large block of almost pure aluminum is rolled through giant steel rollers, several times, reducing the thickness of the aluminum block and spreading it out to make it longer. Lubricants are added to facilitate the operation. At each successive pass through the rollers, the thickness is reduced. The process is repeated until foil thickness is reached, and the large flat sheet is then split into the desired widths.

This may seem simple enough, but the actual process can be tricky. For example, as the aluminum is rolled out, it heats up. If it heats up too much, it can stick to the rollers, so the roller pressure must be carefully controlled.

Once the sheet of aluminum is 5mm thick, it must be rolled again in the cold-rolling stage. First, the sheet is spooled into a roll and then it is fed into the cold-rolling mill for the final stage of milling. It is at this point that the shiny and dull sides of the aluminum are created. Since the aluminum is now so thin, the tension needed to feed it through the cold rollers could easily break it. So, the sheet is doubled. The sides of the aluminum that come in contact with the steel rollers become more polished and shiny, and the sides of the aluminum that come in contact with itself become duller.