The pen in question is a white Waterman Hemisphere, with a medium nib. The section is black so I'm not too worried about staining while I'm filling. But what do you suggest I fill with?
Until now, I've always had a same-ish colour ink and pen (eg Red Lamy Safari has Skrip Red, Blue Sheaffer 330 has Diamine Denim, etc) but white ink would be... well, silly, for a student.
I considered perhaps pink?