Along with the surprise iron gall and sheening aspects, I was also excited by how quickly it dries. With the 1.1mm stub nib I used in the writing sample, it takes about 10-15 seconds to fully dry, but it's usually between 5 and 10 seconds in a Platinum medium nib I've also been using. Overall, pretty quick times, especially on the Rhodia's coated paper.
I've really enjoyed using this blue black ink over the past few weeks. It has a classic navy blue hue, a decent amount of shading, and quick dry times. On top of that, it's a permanent ink. Really solid competitor in the blue black market, and definitely worth your attention.
If you're interested in Platinum's blue black offering, you can pick it up in their proprietary cartridge form (which only works in Platinum pens) or a 60ml bottle. The cartridges come in a ten pack and cost $7 a box, while the large bottle costs a flat $20. Both are a pretty good deal, but I lean toward the bottle since the cartridges only work with Platinum pens. This ink is good enough to enjoy in all pens!
(JetPens provided this product at no charge to The Pen Addict for review purposes.)