There's one ink that I have though that has always performed admirably and looks just downright fascinating to me, and that's Sailor's Seiboku. I wouldn't call this a blue-black at all, except perhaps from a broad nib. However, I think it looks very interesting from a fine or fine-medium nib with lots of character and a fun sheen effect. It dries relatively quickly, does not smear after drying, and is completely waterproof. I didn't want to post these pictures in the reviews forum as they're not really a review, but I'd like to let more people get a look at this ink, since it's expensive enough in some places to discourage buying, and these "nano" inks and their moderate demands on pen hygiene can be a bit of a turn-off for some as well.
For the record, the paper is a Taiwanese brand called ipaper. I find that the paper is sometimes a bit toothier than I prefer, but it does a pretty good job of showing off ink qualities.
Edited by XiaoMG, 17 March 2012 - 04:11.