The thickness of aluminum foil is crucial for its properties and applications. It ranges from ultra-thin foils (less than 0.001 millimeters) used in electronics to heavy-duty foils (up to 0.5 millimeters) used in construction. Key industry players, such as ASTM and JIS, establish standards for foil thickness, while manufacturers like Alcoa and Amcor produce foils with varying thicknesses. Regulations enforced by FDA and CPSC ensure product safety. The thickness of aluminum foil directly impacts its strength, flexibility, and heat resistance, making it suitable for applications such as food packaging, insulation, and electrical shielding.