[paviva]

Use an iron gall ink, such as this one : http://www.registrarsink.co.uk/

[abtinf]

From what I’ve read, iron gall inks are only suitable for use with gold nibs. They will rapidly corrode steel nibs.

[hetman]

Yes, I was also wondering if there are any other nibs besides gold that can survive this ink. Not sure if I'm ready to shell out that much for a fountain pen.