Abstract: Manufacturing process of a thin metal sheet, comprising depositing the metal by electrolysis from a bath containing an aqueous solution of a salt of this metal onto a mobile cathode formed by a rotating drum partially immersed in this bath, removing the metal sheet thus deposited from the non-immersed part of the drum, and replacing in the bath the metal deposited by electrolytic dissolution of an anode containing the same metal. The temperature of the bath is kept higher than its normal boiling point by maintaining on top of the bath a pressure at least equal to the boiling pressure.