www.stylo-plume.org

If the pen has a plastic piston seal (not a cork), you can lubricate it. You must first find some 100% silicone grease. In the U.S.A., this grease is sold for use by divers (to lubricate SCUBA gear) and by restaurateurs (to lubricate food processing equipment). Some online pen dealers (including RichardsPens.com) also carry it. Do not use any silicone grease that contains even the tiniest amount of petroleum distillates!

To lubricate the piston, empty the pen completely and flush it with water until the ejecta are clear. Draw the piston back up, as if filling the pen, and remove the nib unit. Twist the corner of a paper towel into a point (often called a “twizzle”), insert it into the open end of the pen barrel, and use it to absorb any remaining droplets of water from the inside of the barrel. Put a tiny amount of grease on the end of a wooden toothpick or match. Insert the toothpick or match into the open end of the barrel, and apply the grease around the inside of the barrel as close to the piston as you can get it. Now run the piston down and back up a few times. It should move very easily after the first stroke. Reinstall the nib, fill the pen, and write!

silverado a écrit :Excellent ! Merci bien Dwight Il me reste à savoir quel type de graisse siliconée il va me falloir trouver (et où ?) et comment l'identifier... (un nom ?).
Dès que j'aurais trouvé ce graal, je te ferais savoir le résultat !