Hello everyone.
I like to first make my sketches with pencil, then with ink pens, and only then the watercolours.
I’m using rotring xonox graphic pigment ink pen of various sizes, but, sometimes, the ink seems not really waterproof when i start my watercolours.
Can someone advise me on a really lightfast and waterproof black ink pen for sketching, that works impeccable with watercolours?
Cheers
Jorge Russo

