Production of metal-based thin foils

A process for the production of thin metal-based foils, comprising the acts of:

• providing an extruder, a coolant bath, and a rolling system comprising at least two rollers;
• extruding a metal through the extruder to form a preliminary foil, wherein the preliminary foil has a thickness from 100 to 150 μm;
• cooling the preliminary foil in the coolant bath containing liquid nitrogen at a temperature between 63 K and 77 K;
• and
• then rolling the preliminary foil at least once in the rolling system comprising at least two rollers to form a thin metal-based foil with a thickness from 5 to 80 μm, wherein during rolling, the preliminary foil is kept below its tear threshold by increasing the temperature of the center of the foil,
• wherein the rolling system is cooled by the same coolant used in the coolant bath, and wherein the rolling system is not immersed in the coolant bath.