@Elaine
1mm is thick so you should for for B nib. As for fountain pen brands, there are just too many to recommend. Maybe go with Lamy or Pilot.
I don't think there are white opaque inks for fountain pens. Because white inks will be heavily pigmented to be opaque, and heavily pigmented inks are not safe for use in fountain pens. You should go with white gel pens instead.
@Elaine
1mm is thick so you should for for B nib. As for fountain pen brands, there are just too many to recommend. Maybe go with Lamy or Pilot.
I don't think there are white opaque inks for fountain pens. Because white inks will be heavily pigmented to be opaque, and heavily pigmented inks are not safe for use in fountain pens. You should go with white gel pens instead.