In my quixotic quest for the perfect black ink I made it to testing the Archive Ink (Archivtinte) from De Atramentis. I couldn't see a review in the index so here are my notes.
The ink has a neutral dark colour and is intended as a cheaper alternative to their Document inks for daily use. (It is only about 16% cheaper so I don't know how much that will actually matter to buyers.) Unusually they do not actually elaborate on what, exactly, "archive" means for this ink, not even (as far as my rusty language skills can see) in three very long paragraphs on the German language version of the site, except that it has (with the Document ink) the highest light-fastness score of their inks.
What I like: Neutral dark colour. Waterproof.
What I don't like: Not smear-proof!? Maybe more feathering than the Blue-Black Document ink and about the same bleed-through.
Hope this is helpful.