Aluminum foil

Aluminum foil . Known as paper silver or platita for its resemblance to the polished chrome reflecting alumina), they are thin sheet aluminum of a thickness less than 0.2 mm, having as fine measurements as those that are below 0.006 mm. Thus, the metal sheet is extremely flexible and can be bent or covered objects very easily. However, this product is fragile and easily damaged, being commonly laminated in combination with other materials such as plastic or paper to make it more useful.

 

Summary

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  • 1 History
  • 2 How do you know which side of the aluminum foil is facing in or out and why is each different?
  • 3 Uses
    • 1 Food packaging
  • 4 Properties
  • 5 Insulator
  • 6 In the kitchen
  • 7 Conclusions
  • 8 Source

Story

Aluminum foil is a thin sheet of aluminum that, as a result, is extremely malleable and allows many uses in everyday life, including being able to wrap various objects. Conductive of electricity and is also used as packaging paper for wrapping food . In Spain it is popularly known as “Albal paper”. Long before modern aluminum foil, tin foil was used and distributed for similar purposes. At the end of the 19th century and the beginning of the 20th century, thin tin sheets were already very popular and when the new aluminum foil sheets began to appear on the market, people continued to refer to them as tin sheets. The new product was better than the old sheets oftin because tin left ‘strange’ flavors in food, as well as its resistance and performance being inferior to those of aluminum. When it was introduced to the market, it took several decades to replace the use of tinfoil in the mid- 20th century . It has the special quality that it repels heat, for example, it is a good material to place food when making it in the oven since this material completely repels heat and can take it perfectly without burning after said material has endured very high temperatures. The most common use of this paper is to wrap food. Aluminum foil is used to pack food products, cosmeticsand chemicals, while the remaining 25% has industrial uses. The first uses of these leaves were the packaging of tobacco products, chocolate bars. Over time the producers were adding lacquers that colored the aluminum sheets.

 

How do you know which side of the foil is going in or out and why is each different?

Aluminum foil has two sides, one shinier than the other. Which side goes out or which side goes in when cooking? That is, which side “touches” the food and which side does not?

At the time of manufacture and the laminate it is passed through a series of rollers that makes it increasingly thin until it is more than 2/10 mm, but its final thickness is 1/10 of a millimeter, an element that cannot be This is achieved with the adjustment of the laminating rollers and it is achieved by passing the double paper, or better said by passing two sheets of paper of those that already had 2/10 mm, so this is left with a glossy side (the one in contact with the rollers) and a little polished that is the one that is in contact with the other face of the aluminum foil as it passes through the laminating roller. This is how the aluminum foil is left as we commonly know it. Now, when it comes to wrapping food, the use is indistinct, from the practical point of view of course,

 

Applications

Food packaging

Aluminum foils are used in food packaging, providing an increase in their consumption life, in this way it can be seen in beverages, dairy products and other sensitive products. The leaf acts in these cases as a barrier against light (which ends up degrading fats ), odors, bacteria, and preventing moisture from being gained or lost. Aluminum sheets are also used as kitchen elements to make cakes, cook fish , meat, etc. The home use of these sheets is widespread throughout the world and can be found in almost any refrigerator wrapping food (generally with the intention of preventing odors), to carry foods such as sandwiches for lunch, or fast food.

 

Properties

Aluminum sheets generally have a brighter (reflective) surface than another, which is usually more matte. This effect is the result of its manufacturing process. As aluminum sheets are easy to tear, the sheets are processed in pairs in machines to increase their overall strength and in this way the part that was in contact with another aluminum sheet has a matte finish, while the opposite side is shiny. . This reflective difference in the finish of the aluminum foil leads many to believe that this is an advantage in the kitchen when cooking food with foil, as the glossy part is said to ‘reject’ heat while the Mate retains it and in this way the food cooks better.

 

Insulating

Aluminum foil is also very widely used as thermal insulation (barrier and reflectivity), in heat exchangers (heat conduction) and electricity cables (barrier and electrical conductivity). The sheets in a special alloy are used even in the structural interventions in the form of honeycomb of some structural components of the airplanes. Aluminum foil due to its high conductivity characteristics make it an accessory in tobacco filters, a sheet of perforated aluminum foil that is placed between the carbon and the tobacco. In offices where the sun is very aggressive, it is customary to cover the window with a sheet of wood covered with this paper.

 

In the kitchen

Aluminum foil is also used in the barbecues of some of the most delicate foods, such as mushrooms and vegetables; The food is wrapped in aluminum foil and later placed on the grill, thus avoiding the loss of moisture that can lead to less attractive textures. As is the case with all metallic elements, aluminum foil reacts negatively to microwaves and its use should be avoided. This is due to the effect of the electric fields of the microwaves causing the accumulation of charges in a sudden way in some pointed parts of the aluminum sheet; If enough charge builds up, it discharges to a different place on the sheet, creating a spark (for example arcs). Due to the frequent use of food services,

 

Conclusions

Aluminum sheets generally have a brighter (reflective) surface than another, which is usually more matte. This effect is the result of its manufacturing process. As aluminum sheets are easy to tear, the sheets are processed in pairs in machines to increase their overall strength and in this way the part that was in contact with another aluminum sheet has a matte finish, while the opposite side is shiny. . This reflective difference in the finish of the aluminum foil leads many to believe that this is an advantage in the kitchen when cooking food with foil, as the glossy part is said to ‘reject’ heat while the Mate retains it and in this way the food cooks better.

 

by Abdullah Sam
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