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Household Aluminium Foil Alloy 8011 Outside Bright
Because of the shiny side and the dull side of aluminum foil (tin foil), many cooking resources say that when cooking aluminum foil to wrap or cover food, the bright side should face inward, facing the food, and the dark side facing outward. This is because the shiny side is more reflective and therefore reflects more radiant heat than the darker side.
Aluminum foil has a shiny side and a dull side. Many people believe that it is important to use which side is facing up. In fact, there is no difference at this point. The reason why the two sides look different lies in the manufacturing process. When the aluminum foil is pushed out, the side that is in contact with the roller will shine.
This explanation does not explain why the shiny side makes no difference. It is just to reiterate with a little explanation that foil does have a bright side and a dark side. Not much information!
No matter why one side of the aluminum foil is shiny and the other side is dim, it is natural that a brighter surface will reflect more than a darker surface. The explanation given seems to indicate that since the shiny and matte sides are just by-products of the manufacturing process and are not deliberately placed there, there is no difference between them. The explanation does not support this statement. So what is the truth?
In fact, the shiny side of aluminum foil is only slightly brighter than the dark side. Although a small amount of extra energy will be reflected by the shiny side, the difference is 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 put the dark side outward. However, when measured at a high temperature for a long time, the difference is so small that the cooking time hardly changes significantly. It seems that there are many explanations to reach the same conclusion
6 Microns Aluminum Foil Suitable For Flexible Packaging Test the surface cleanliness of flexible packaging aluminum foil at room temperature. Double aluminum foil chooses the dark side for inspection
