Because of the bright side and the dark side of aluminum foil (tin foil), the reason why the two sides look different is the manufacturing process. When the aluminum foil is pushed out, the side in contact with the roller will shine.
The manufacturing of aluminum foil is similar to making noodles at home. A large piece of almost pure aluminum is rolled several times by a huge steel roller to reduce the thickness of the aluminum block and unfold it to make it more ⻓. Lubricant is added for ease of operation. The thickness decreases each time the roller passes continuously. This process is repeated until the thickness of the foil is reached, and then the large plate is divided into the required width.
This may seem simple, but the actual process can be tricky. For example, when aluminum is pushed out, it will be heated. If the temperature is too high, it will stick to the roller. Therefore, the roller pressure must be carefully controlled. Once the aluminum plate thickness reaches 5mm, it must be rolled again in the cold rolling stage. First, the thin plate is wound into a roll, and then sent to the cold rolling mill for final milling. It is at this point that luminous and dim aluminum surfaces are created. Since aluminum is now so thin, the tension required to feed through the cold roll can easily break it.
Therefore, the aluminum foil is double-layer, the aluminum side in contact with the steel roller becomes more polished and bright, and the aluminum side in contact with itself becomes dimmer.
Many cooking resources say that when cooking with aluminum foil packaging or covering things, the bright side should face inward and face the things, and the dark side should face outward. This is because the glossy side is more reflective, so it reflects more radiant heat than the darker side.
In fact, the shiny side of aluminum foil is only a little brighter than the dull side. Although a small amount of extra energy will be reflected by the shiny side, the difference is very small, and there will be no actual difference in cooking. It is inaccurate to say that there is no effect, and it may still be more effective to turn the dark side outward. However, when the time is measured at a high temperature, the difference is so small that the cooking time hardly changes significantly.
Yutwin 8011 aluminum foil is mainly used for food packaging foil, drug packaging foil, milk capping material, lunch box material, container foil, household foil, barbecue foil, beer sealing foil, bottle capping material, etc. the thickness range applied to food packaging is generally about 0.006-0.3mm. Yutwin can customized based on customer requirements.
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Post time: Sep-09-2022