Fountain pen provided with a nib (1) of steel, an aeration hole (2), a slit (3), a tip (5) and at least one plate (4) made of noble metals or metal alloys, preferably gold, characterized in that said plate (4) of noble metals or metal alloys is placed in the vicinity of the vent hole (2) and is heated by an electrical circuit (8) located within the pen and comprising at least one resistor (9) and a battery power supply placed in a body of said fountain pen, said replaceable or rechargeable battery or being recharged and / or supplied with power by at least one photovoltaic cell placed on the outer surface of this fountain pen.
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