Is it really COMPLETELY waterproof? My experience with this ink is a bit different: the ink doesn't smudge or easily dissolve, but if I lay a wash with a brush well loaded with water (like a watercolor wash), I get a greyish halo around the ink marks, which makes it unusable for ink and wash techniques (I do let my drawing fully dry, for a day or more). I wonder if there's a problem with my bottle. I also use W&N indian ink and Liquitex ink, and they are completely waterproof, but I haven't tried them with a technical pen.
Is it really COMPLETELY waterproof? My experience with this ink is a bit different: the ink doesn't smudge or easily dissolve, but if I lay a wash with a brush well loaded with water (like a watercolor wash), I get a greyish halo around the ink marks, which makes it unusable for ink and wash techniques (I do let my drawing fully dry, for a day or more). I wonder if there's a problem with my bottle. I also use W&N indian ink and Liquitex ink, and they are completely waterproof, but I haven't tried them with a technical pen.