You're very lucky. I wish I had a chance to chat with your father. I also collect fountain pens, but not with that laser focus. He probably has a favorite ink

You're very lucky. I wish I had a chance to chat with your father. I also collect fountain pens, but not with that laser focus. He probably has a favorite ink to use with his fountain pens, since inks change both a pen's behavior and their interaction changes from paper to paper. There's a list of popular, run of the mill inks which work very well with lower quality paper. I also use these inks with my daily driver pens and notebooks, since they're easy to maintain, looks nice, and works with almost any notebook out there. However I had some notebooks which were not writable unless you use a gel, ballpoint or some rollerballs. Fountain pen ink just stayed as little droplets and never dried on them.