Method for manufacturing a mechanical timepiece part provided with a magnetic functional area

A method for manufacturing a mechanical timepiece part comprising at least one functional area wherein a lubricant is able to be confined, the method comprising:

• a step of constructing a blank of said part including said at least one functional area;
• and
• a step of transforming said at least one functional area into a magnetized functional area capable of cooperating with said lubricant having magnetic properties in achieving said confinement of the lubricant in said at least one functional area,
• wherein the transformation step comprises the following sub-steps:
• forming at least one channel in a portion of the blank body located in said at least one functional area behind a functional contact surface comprised in said at least one area
• inserting a fluid comprising magnetic particles in said at least one channel;
• magnetizing the magnetic particles comprised in said fluid;
• defining an orientation of the polarity of the magnetic particles comprised in said fluid relative to a polarity of said lubricant;
• and
• curing said fluid comprising the magnetic particles magnetized and provided with an oriented polarity, and
• wherein the magnetizing, defining and curing sub-steps are carried out substantially simultaneously.