Perhaps there is no such person who would not know about foil. It has long come into the everyday life of people and is used for various purposes: in cooking, medicine, construction, creativity, printing and other areas. Let's find out what it is all about, what it is made of and what types there are.
The content of the article
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Definition
- Characteristics
- Varieties
- Where is applied
Definition
Foil is the thinnest metal sheet of "paper". Its thickness varies: 0.0001 to 0.2 mm. He is quite flexible and malleable. It can be made from aluminum, tin, copper, silver, gold and other metals and alloys.
- Iron or steel sheet is called tin, and the word "foil" is usually not applied to such materials. The thickness varies - 0.10-0.36 mm.
- For the thinnest tin sheets, there is a separate name - stanyol.
- Precious metal products are the thinnest. They are called gold leaf, and their thickness is no more than 0.00001 mm.
Interesting fact! Initially, the stress in the word "foil" was placed on the first syllable, but then this formulation was recognized as obsolete. It is now generally accepted and correct to emphasize exclusively the second syllable.
If we talk about the foil, which is in every kitchen, then such sheets are made of aluminum. Usually their thickness is within 0.2 mm.
It is believed that they first learned about it in 1911. It was then that Alfred Gauci from Switzerland patented food foil, and then began to use it for packaging confectionery. A couple of years later, the idea was taken up by TM "Maggi", which is famous for its bouillon cubes.
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Characteristics
If we talk about aluminum food foil, then it has been and remains a fairly popular product. Its use facilitates the cooking process, since it has many advantages:
- excellent thermal conductivity;
- environmental friendliness;
- safe in contact with food;
- resistance to high temperatures - does not melt even at 600 ° C;
- plasticity - you can give any shape.
If you carefully examine the sheet, you can see that one side of it is matte, and the other is more shiny. This feature is obtained during the manufacturing process. The metal is rolled out with special rollers to the state of the thinnest film. The side that was in contact with the device is shiny. Thus, matte absorbs infrared radiation, while glossy reflects.
Varieties
- By type of surface - one-sided (with two matte sides) and two-sided (matte + glossy).
- In texture - smooth or textured.
- Household foil - laminated (cached) and painted. Designed for confectionery products.
- In printing - holographic, diffractive, magnetic and erasable scratch foil.
- For decoration and refinement - metallized and colored.
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Where is applied
Today foil used in many areas of industry, as well as in everyday life:
- in electrical engineering;
- in medicine;
- construction - as insulation;
- polygraphy;
- applied art - the creation of crafts, jewelry, gold leaf is glued to the surface to effect that the item is completely made of precious metal;
- in refrigeration engineering, automotive (as fire protection), as a decorative element of structures;
- in cooking - for baking dishes and freezing them, storing food, protecting the stove from contamination, aseptic packaging of liquids;
- in everyday life - cleaning silver items, sharpening blades, ironing clothes.
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