Here’s the third of the Tokyo Limited Edition inks by Pilot Iroshizuku which I got from Everything Calligraphy. It’s a very mellow kind of baby blue color. It looks like it’s best used with medium nibs or wet writers. The color is very light.
It would also probably be very nice to use for calligraphy nibs.
I’m not sure it would be very suitable for official writing (like signatures and other work documents). I see it more as an ink color for creative applications.
It’s saturated enough to make it a readable ink, but I must admit I prefer darker blues. It flows great, though. It’s a wet-flowing ink that dries moderately fast (15-20 seconds, depending on nib and paper). It also has expressive shading. If you like light blue inks, this one is a great option. It’s not waterproof, but it also doesn’t completely wash off. Here are a few close ups of the writing sample:
These limited edition Iroshizuku inks are available at Everything Calligraphy.