Aluminum Foil

Thickness
Aluminum foil scrap is less than 0.2 millimeters (7.9 mils) thick, with thinner gauges down to 6 micrometers (0.24 mils).
Aluminum content
Post-consumer aluminum foil scrap is 97% to 98% aluminum, with other metals like copper, silicon, iron, manganese, magnesium, zinc, and titanium making up the remaining percentage.
Contaminants
Aluminum foil scrap must be free of paper, plastic, plastic coating, cardboard, thermo break, inked foil sheets, and other contaminants.