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Aluminium foil acts as a total barrier to light and oxygen (which cause fats to oxidise or become rancid), odours and flavours, moistness, and germs, it is used broadly in food and pharmaceutical packaging. The purpose of aluminium is to make long-life packs (aseptic processing|aseptic packaging) for drinks and dairy goods, which allows storing without refrigeration. Aluminium foil containers and trays are used to bake pies and to pack takeaway meals, ready snacks and long life pet foods.

Aluminium foil is widely sold into the consumer market, often in rolls of 500 mm (20 in) width and several metres in length.It is used for wrapping food in order to preserve it, for example, when storing leftover food in a refrigerator (where it serves the additional purpose of preventing odour exchange), when taking sandwiches on a journey, or when selling some kinds of take-away or fast food. Tex-Mex restaurants in the United States, for example, typically provide take-away burritos wrapped in aluminium foil.

Aluminium foils thicker than 25 μm (1 mil) are impermeable to oxygen and water. Foils thinner than this become slightly permeable due to minute pinholes caused by the production process.

Aluminium foil has a shiny side and a matte side. The shiny side is produced when the aluminium is rolled during the final pass. 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. When the sheets are later separated, the inside surface is dull, and the outside surface is shiny. This difference in the finish has led to the perception that favouring a side has an effect when cooking. While many believe that the different properties keep heat out when wrapped with the shiny finish facing out, and keep heat in with the shiny finish facing inwards, the actual difference is imperceptible without instrumentation.The reflectivity of bright aluminium foil is 88% while dull embossed foil is about 80%.


Aluminium (or aluminum; see spelling differences) is a chemical element in the boron group with symbol Al and atomic number 13. It is a silvery white, soft, ductile metal. Aluminium is the third most abundant element (after oxygen and silicon), and the most abundant metal in the Earth's crust. It makes up about 8% by weight of the Earth's solid surface. Aluminium metal is so chemically reactive that native specimens are rare and limited to extreme reducing environments. Instead, it is found combined in over 270 different minerals.The chief ore of aluminium is bauxite.

Aluminium is remarkable for the metal's low density and for its ability to resist corrosion due to the phenomenon of passivation. Structural components made from aluminium and its alloys are vital to the aerospace industry and are important in other areas of transportation and structural materials. The most useful compounds of aluminium, at least on a weight basis, are the oxides and sulfates.

Despite its prevalence in the environment, no known form of life uses aluminium salts metabolically. In keeping with its pervasiveness, aluminium is well tolerated by plants and animals. Owing to their prevalence, potential beneficial (or otherwise) biological roles of aluminium compounds are of continuing interest.


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Q:Why chocolate is packaged by aluminum foil?
Also just taken out of chocolate in the refrigerator, do not immediately open, let it warm to room temperature and then substantially open, the outer layer of chocolate will not affect the appearance and taste of the condensation mist.
Q:Is a double-sided aluminum foil moisture-proof pad enough for wildness camping?
Aluminum foil conducts heat well and you will feel cold. I suggest you bring another pad, for example, the Pureland hexagon.
Q:What's the specification of aluminum tape?
Aluminum foil tape can work with all the seams of the aluminum foil composite material, the seal of puncturing spot of bar for line and repair of breakage. It is the main material of refrigerators and freezers factory, and also the must-purchasing raw materials of heat preservation material distribution department. Products are widely used in refrigerators, air conditioning, automobile, petrochemical, bridge, hotel, electronics and other industries. The product description of aluminum tape. Its purity is higher than 99.95% to eliminate electromagnetic interference (EMI), prevent electromagnetic wave from harming human body and avoid the voltage and current to influence function. In addition, electrostatic discharge after the ground has a good effect. Material is polyester fiber, which is not easy to appear cracks and be damaged in the repeated usage or bendings. It has pasting ability, good conductivity and can easily fit in the wire winding and also can be cut according to customer requirements into specifications.
Q:Why some board mounted pills are covered with a layer of aluminum foil?
Tropical aluminum structure is NY25 / Alu60 / VC, super good barrier properties, but can also punched out in the above pattern, further play publicity. However, once this package apart, tropical aluminum barrier function is not, so to finish as soon as possible.
Q:As for the use of aluminum foil paper,which side is the front side?which side do we use when using the baking oven?
My mouth is watering when having teppanyaki.The back side(bright side) faces the outside to wrap the food.when cooking some dishes(fried cod fish),you need to punch small holes with toothpick in case of the aluminum foil broken and the liquor splashing.Hope you enjoy cooking.
Q:Is aluminum foil insulation materials easy aging?
Is usually not easy aging, aluminum foil has good gas barrier and light barrier effect. But depends on the environment of use, aluminum foil Insulated material is usually complex, not just aluminum, the center may also have a sandwich, the key is to see what the sandwich material.
Q:What is performance advantages of carbon-coated aluminum foil?
4. Protect collector, extend battery life. Such as: • prevent collector electrode corrosion, oxidation; • improve current collecting electrode surface tension and enhance the current collecting electrode coating performance and easy; • higher-cost alternative to replace the original etched foil or foil with standard thinner foil.
Q:Is heated aluminum foil gasket toxic?
Aluminum foil is a kind of thermoprinting material made by calendaring aluminum into sheet. Since its thermoprinting effect is similar to that of silver foil, it is also called fake silver foil. As aluminum is soft and ductile with silvery luster, aluminum foil sheet can be made by mounting calendered aluminum sheet on the offset paper with sodium silicate, which can be used to print. But the color of aluminum foil will gradually become dark as it is easy to be oxidized and it fade due to friction and touching, so it is not applicable to the thermoprint of book covers for permanent preservation.
Q:What specification does air hose of aluminum foil have?
The installation methods and standards of air hose of aluminum foil composite sandwich board. 1.construction preparation 1.1 The construction supervisor must be familiar with air hose, air inlet arrangement plan, design requirements and related specification and rules. He or she should also know air hose, air inlet making and installation technology and confide a technological secret to group leader. 1.2 According to construction progress, the supervisor should make a demand planning of board and other auxiliary materials and exam the implementing. 1.3 Before the construction, the quality inspetor should take a complete inspection to construction equipment and maerial. Only when everything is qualified, can workers start. What's more, the corresponding record should also be made. 2. Construction process.
Q:Does the aluminum foil belong to metal material
Yes. It is a kind of light weight metal material.

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