Process for manufacturing a distribution partition

A method of manufacturing a spray partition pierced by a network of holes through which a fluid product passes under pressure so as to be broken into fine droplets, the process comprising:

• a) providing a laser source that produces a laser beam,
• b) forming the laser beam into an array of partial laser beams that are parallel by directing the laser beam onto a mask configured to block or absorb a portion of the laser beam and to allow another portion of the laser beam to pass or be reflected in the form of the array of partial laser beams,
• c) directing the array of partial laser beams so as to strike a membrane,
• d) striking the membrane with the array of partial laser beams to pierce a series of holes in the membrane,
• wherein an entirety of the network of holes of the spray partition are obtained by consecutive series of holes by a plurality of arrays of partial laser beams;
• and
• wherein said step of forming the laser beam into an array of partial laser beams that are parallel by directing the laser beam onto a mask is repeated using a plurality of different masks, each of the plurality of different masks defining a different array of holes.