(Further edit: 3:38 a.m. UTC, Feb. 21, 2006: Belated thanks, M. Stuart, for the recommendation to use a wet-writing pen with this ink. I modified the "topic description" for this topic thread.)
This is an "iron gall" ink (an old or ancient formula for permanence, more so on parchment and animal skin than on paper, but still very water-resistant on paper).
I put a cartridge of it in my Lamy Safari with a medium nib, which has consistenly been medium in flow (on the wet side in my experience, but by consensus far from the wettest pen), and was surprised. I threw out the cartridge, flushed out the section, got the section as dry as possible and put another cartridge of the same color in. The result was the same.
Lamy Blue-Black goes onto any quality of paper in a gray color with only the tiniest hint of blue.
It doesn't lubricate the writing action.
It performs as well as Skrip Blue and Skrip Purple (Slovenian) on loose-fiber paper.
It dries quickly.
It shows some shade variation.
The dry color is a rather faint shade on all qualities of paper including Crane's 100% cotton "Kid Finish" (35 pound) and the FPN's own excellent notepad paper.
Running tap water over a many-hours-dry sample on cheap notepad paper proved the color water resistant; it became fainter but didn't run or spread into the wet paper.
Here are the previous comments I've found about Lamy Blue-Black:
QUOTE (jsparks @ Nov 19 2005, 03:20 AM)
Lamy Blue Black (I found this ink very dry so it has a bit of soap added to it and now maybe it's too wet, but the color didn't change).
QUOTE (yuri @ Sep 26 2005, 03:47 PM)
As for Tahitian . . . . Because I dipped my pen I can not say anything about flowing, but at least nothing extraordinary, like dry or chalky feel from Montbanc and Lamy Blue Blacks.
QUOTE (Keith with a capital K @ Dec 4 2004, 01:40 AM)
(talking about writing left-handed) Lamy blue black and Noodlers Polar black are two of the fastest drying inks I have used and can only me smeared if one was using a relly wet writing pen.
I guess some people might like Lamy Blue-Black; they can enjoy it for me. At least the package of five cartridges was cheap. If you want my three remaining carts, PM me.