Method for filling an ink cartridge for a printer in an ink filling station, characterized in that it comprises the following steps: - determining the type of cartridge to be filled; - searching in a database, at least one item of information associated with said cartridge to be filled; - placing the cartridge to be filled in the ink-filling station, said ink cartridge to be filled comprising a wall separating one or more internal reservoirs of the cartridge from the outside of the cartridge; - piercing an opening passing through the wall from the outside of the cartridge to said inner reservoir, the position of said through opening depending on the information associated with said cartridge to be filled; - filling by injecting ink through said through opening of said inner reservoir under ink injection conditions relative to the ink injection flow rate and to the time depending on said information associated with said cartridge to be filled, the filling of ink into the reservoir is effected through a filling needle introduced into said inner reservoir, the depth of penetration of the filling needle into the inner reservoir being fixed, or evolving over time in a continuous or discrete manner, said depth being dependent on the information associated with the cartridge; - sealing by cooling a deposit of molten plastic material in said through opening under sealing conditions dependent on the information associated with said cartridge to be filled, said plastic material is a polylactic acid polymer comprising between 0 and 5% additive, said additive having properties of reducing the crystallization kinematics of said PLA polymer; - pressurizing or depressurizing following the sealing step, during which at least one inner reservoir is brought to a set pressure by blowing or sucking air into said inner reservoir. - determining the type of cartridge to be filled; - searching in a database, at least one item of information associated with said cartridge to be filled; - placing the cartridge to be filled in the ink-filling station, said ink cartridge to be filled comprising a wall separating one or more internal reservoirs of the cartridge from the outside of the cartridge; - piercing an opening passing through the wall from the outside of the cartridge to said inner reservoir, the position of said through opening depending on the information associated with said cartridge to be filled; - filling by injecting ink through said through opening of said inner reservoir under ink injection conditions relative to the ink injection flow rate and to the time depending on said information associated with said cartridge to be filled, the filling of ink into the reservoir is effected through a filling needle introduced into said inner reservoir, the depth of penetration of the filling needle into the inner reservoir being fixed, or evolving over time in a continuous or discrete manner, said depth being dependent on the information associated with the cartridge; - sealing by cooling a deposit of molten plastic material in said through opening under sealing conditions dependent on the information associated with said cartridge to be filled, said plastic material is a polylactic acid polymer comprising between 0 and 5% additive, said additive having properties of reducing the crystallization kinematics of said PLA polymer; - pressurizing or depressurizing following the sealing step, during which at least one inner reservoir is brought to a set pressure by blowing or sucking air into said inner reservoir.