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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:What is the Aluminum to Earth ratio?
Abundance of aluminum in the crust is estimated to be about 8.2% of crustal mass, however this cannot be measured directly (it is estimated from the abundance of metal in the oceans). As the crust represents about 3% of the mass of the earth, and there are no more than trace amounts of aluminum elsewhere in the earth (ie mantle and core), aluminum represents about 8% * 3% = 0.25% of the total mass of the earth. Thus, the ratio of Aluminum to Earth (by mass) is about 1:40000
Q:What's the result after mistakenly eating the aluminium package when taking the pill?
If you have the digestive tract symptom like abdominal distention,I suggest you should go to hospital to have a check to see.Watch the excrement if you have no symptoms after mistakenly eating the aluminium package. If you have abdominal pain……
Q:What's the aluminum foil?
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:Does aluminum foil bag have property of X-ray proof?
Lead is the best material of property of X-ray proof.
Q:What are the characteristics of color coated aluminum coil?
1. smoothness: High temperature composite surface without indentation. Board no residual stress, deformation after shearing. 2. Decorative: Painted wood, Shiwen, there is a realistic physical texture with fresh natural beauty. Random pattern and do, to the customer a wide range of personal choice, to enrich the cultural connotations of products, give people more enjoy the beauty.
Q:inhaling aluminum foil?
Are you talking about when you barbecue? Aluminum oxide is the gaseous compound that is released when you use aluminum foil to cook with. When used on a regular basis it will cause problems with memory but not necessarily with the lungs unless you get a large cloud of grease and fire along with it. The same goes for aluminum pots and pans. The more you use them for cooking the greater the chance of memory loss. Several tests have been done, one of which was performed by the medical college in my home town of Milwaukee, WI. They studied nursing home patients in which the facilities used aluminum cookware. Then had then switch to all stainless steel and retested the patients. They had a greater than 65% improvement in the alzheimer symptoms and found that perhaps are many as 20% of them were misdiagnosised with alzheimers instead of aluminum toxicity.
Q:Does the aluminum foil can be effective in the environment of temperature 430 degree?
The melting point of aluminum is 660.4 degreeand the boiling point is 2467 degree.The aluminum foil has heat resistance.aluminium oxide is white powder and covalent compound, with melting point 2050℃ and boiling point 3000℃.
Q:The Egg Tart foil can put the microwave it
Talking about it:Microwave ovens can not be used in metal and enamel products because metals reflect microwaves. The utility model not only reduces the heating efficiency of the microwave oven, reduces the heating uniformity, but also causes the contact of the microwave and the metal to produce sparks, which can cause danger and damage the magnetron in serious condition.However, some special effects can also be achieved by the use of metals, such as reflected microwaves. Foil (aluminum foil) is a kind of metal material, it can also reflect the microwave, if we are to take longer cooking food, with a small "foil" package are easily cooked, cooked after a while to get rid of "foil", continue to cook, it can make the food cooked more evenly. However, in use, the part of the light should be close to the food to reduce the reflected energy.
Q:For the solar water heater / air conditioning insulation insulation used (aluminum foil tape) can buy from where?
All those selling refrigeration parts and central air-conditioning are available
Q:What are the advantages and disadvantages of aluminum foil packaging?
Excellent barrier properties , moisture-proof, airtight, Paul Hong, the contents of the package to prevent moisture absorption, oxidation and volatilization deterioration of its moisture barrier, oxygen barrier properties. Easy processing of aluminum foil, plastic film and paper can be complexed with.

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