I recently purchased a bottle of Lamy Blue-Black and was quite surprised by the performance. It seemed to do much better than any review would have had me believe. I initially purchased the ink more or less just to get the bottle (with the hope that I might actually like the ink), but after using this ink for a couple of weeks I have to say that I am really impressed with it. This leads me to believe that either Lamy has reformulated their reformulated version of Blue-Black, or that folks have been overly critical of what I have found to be a pretty good ink.
Right now I am using this ink in a Jinhao X750 with a Knox 1.1 nib; and in a Jinhao X450 with an Anderson Pens 1.1 nib (identical to the Goulet Pens 1.1, but with different brand etchings, obviously). I have used the ink on a number of different papers all with fairly similar results. What I have found is that this ink does not write overly wet, but still tends to bleed through a little bit even on good paper. It is an unusual color, it has a nice chalky blue color that dries a little bit on the dark grey side. The most unusual finding is that the ink is actually fairly water resistant. I would not call it waterproof, but I wrote a sample on an index card with a sample written using Chesterfield Archival Vault ink (an iron gall ink) for comparison, ran the card under water, and the Lamy held up fairly well. I would never use it to address an envelope, but I have no issues using it as an every day ink.
I performed three water tests with Lamy Blue-Black and all of them had the same results. The test consisted of me washing the index card under a fast moving tap for 60 seconds. While this could have been made more rigorous by actively rubbing the ink while under water or adding a soap, I feel that my test is adequate for general use conditions. Below is the index card before the test, an example of bleed through (on a Rhodia #12 pad...the bleed through is not as bad here as it is on many other papers, but it is still visible), and the index card after the test.
So, either I am more accepting of Lamy Blue-Black, or it has been reformulated to be a better overall ink. I could believe either scenario, but I tend to think that I am just not as hard on this ink as other folks have been. If it is the case that I am not as harsh as other users, then I tend to think that this is due to the fact that I never tried the old iron gall formulation. In any event, taken on its own merits I think that Lamy Blue-Black is a good ink. It has either gotten a bad rap, or is now better than it used to be. I would be very interested in hearing what other folks think about this subject.
Edited by jabberwock11, 23 December 2015 - 21:37.