Silver foil is a form of ‘metal leaf’, also called ‘composition leaf’ or ‘schlag-metal’, which is a thin foil used for research, decoration or other technical applications. Vark is a type of silver leaf used for decoration in Indian cuisine. Goldbeating, the technique of producing metal leaf, has been known for more than 5,000 years.
Used mostly for research and industrial applications, the foil is manufactured by hot or cold rolling through industrial roll mills. The rolling process involves incrementally reducing thickness of the material through successive passes between the rollers. Silver foils can be rolled between 0.025 mm to. 0.229 mm thicknesses, where silver sheet is normally rolled in .025 mm and above, up to 12 mm.
Before the widespread use of antibiotics, silver foil was wrapped around wounds to help them heal, and colloidal silver and silver-protein complexes were ingested or applied topically to fight illness. Colloidal silver is a product that contains microscopic flakes of pure silver suspended in demineralized water or another liquid. Colloidal silver is no longer considered safe or effective for any of the health claims manufacturers make.