Aluminum foil is a thin, pliable sheet of pure aluminum, made by rolling aluminum ingots until they're extremely thin (often less than 0.006 mm). Valued for its flexibility, malleability, and barrier properties, it's used in kitchens for wrapping food, baking, and lining trays, and in industries for packaging, insulation, and pharmaceutical protection, acting as a complete shield against light, moisture, grease, and gas.
Key Characteristics:
Barrier Properties:Acts as a total barrier to light, moisture, grease, and gases, keeping food fresh.
Flexibility:Easily bent, folded, and shaped to wrap around objects.
Conductivity:Good for heat transfer in cooking.
Appearance:Often has one bright, shiny side and one matte side due to the rolling process.