@Toni
If you want to use watercolour on top of the ink, you'll need to use waterproof inks.
Such waterproof inks are usually pigmented which means there are physical particles so they may clog the pen. So it's important to look for inks that mention specifically they are safe for fountain pen use.
@Toni
If you want to use watercolour on top of the ink, you'll need to use waterproof inks.
Such waterproof inks are usually pigmented which means there are physical particles so they may clog the pen. So it's important to look for inks that mention specifically they are safe for fountain pen use.
I've a list of recommended waterproof inks that are safe for fountain pens in this video:
https://www.youtube.com/watch?v=5StYNJi7-hU