How the Montblanc piston works

When rotating the rear cone, the piston moves within the reservoir. With the nib immersed in ink, the piston's return creates the necessary pressure difference to draw the liquid.

The operation should be smooth and performed without haste. The nib needs to be sufficiently submerged to avoid excessive air intake.

Abnormal resistance, irregular movement, leaks, or low capacity may indicate residue, compromised sealing, or wear. Do not apply force to overcome a stuck mechanism.

Cleaning with water is suitable for routine maintenance, but disassembly and lubrication should be handled by professionals familiar with the reference.