Why Is Aluminum Foil Shiny On One Side
Camila Farah
So which side of the foil do we need to be using.
Where the foil is in contact with another layer that s the dull side reynold s explains. In the final rolling step two layers of foil are passed through the rolling mill at the. The shiny side stop s sticking because it s the side that s prest smoothest from the rollers when it produced. Or shiny side inwards if wrapping say a joint of meat.
The foil is milled in layers. Most people do it wrong and have shiny side outside. It is difficult to produce rollers with a gap fine enough to cope with the foil gauge therefore for the final pass two sheets are rolled at the same time doubling the thickness of the gauge at entry to the rollers. The answer you ask.
If there s no trick to it then why exactly does aluminum foil have a shiny and a dull side in the first place. The reason happens to be a simple one. Since aluminum foil has a shiny side and a dull side many cooking resources say that when cooking foods wrapped or covered with aluminum foil the shiny side should be down facing the food and the dull side up. The reason aluminum foil or tin foil as we sometimes inaccurately call it has a flat side and a shiny side has everything to do with the way it is produced.
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To give you some context aluminium foil is made shiny on one side and dull on the other by heavy rollers used to roll out the foil in the manufacturing process. This is because the shiny side is more reflective and so will reflect more of the radiant heat than the duller side. According to the aluminum. If these layers were not brought into contact with each other during the production process the foil would break.
These slabs are then pressed between rollers many many times to make them thinner and thinner. Sorry to disappoint but the two different sides are just the result of the manufacturing process. The shiny side is produced when the aluminium is rolled during the final pass.
Source : pinterest.com