(Another quickie which is largely a by-product of my testing my desk pens...)
Colour: I like it, it's a very pleasant dark grey tending towards the cooler side of the spectrum. I think it sorta fills a gap between Iroshizuku fuyu-syogun and Iroshizuku take-sumi which isn't filled by any of the colours in the Iroshizuku range (including shin-kai). On the other hand, there is nothing outstanding about it.
Flow: Flows well enough, but not overly wet. That is a good thing.
Drying time: Very quick with my 'Japanese fine' nibs, with basically no smearing after 5 seconds. My pen with the fude nib seems apt to leave a blob of ink at the top of my zeroes, and those are still prone to smearing after 20 seconds.
Water resistance: Very good.
Ghosting and bleed-through: None whatsoever observed from writing on the Rhodia paper I used.
Shading: Some, but not very pronounced.
Sheen: Not that I can see.
Edited by A Smug Dill, 13 October 2018 - 09:17.