Foil (from the Latin "folium" - sheet) is a thin tape or sheet of various metals or alloys having a thickness of 2 to 100 micrometers. Most alloys consist of aluminum, lead, tin, sulfur and other elements.
The properties that this material possesses ensure its application in many industries. Aluminum foil does not pass water, fat and even various gases. These protective properties make it an almost ideal material for flexible packaging. Unlike tin foil, which is no longer in use, aluminum is convenient to use and safe for health. And its ability to withstand high temperatures without melting and without losing shape is known to all.
Traditionally, the production of foil is carried out in a cold rolled manner. Although this method is not the only known one. Depending on the type of production, the foil can be labeled as follows:
H19 - Cold rolled extra hard aluminum foil
H24 - Hardened Aluminum Foil
GH28 - solid aluminum foil.
OH - Annealed Standard Aluminum Foil
GOH - Annealed Clarified Aluminum Foil
H18 - Cold rolled aluminum foil
This kind of foil, like lacquered, is obtained by the electrolytic method. Those. deposition of aluminum particles on a paper base in vacuum.
Types of foil made by various technologies are widely used in food, dairy, tobacco, medical and many other industries.
Not many people know that it is possible to sharpen blades on a sharpener if you wrap a pencil placed in it in foil. And the gold foil is considered the thinnest - its thickness is 0.00001 mm.