I got this wonderful ink off a fellow pen and ink addict on Singapore Fountain Pen Lovers' Facebook page. It costs me SGD$25 to get this bottle. This is cheap to be able to get an Iroshizuku ink at this price.
As you write, the ink lays down a deeper more mysterious looking shade of green. As it dries, it leaves behind a darker shade of turquoise. I would prefer if the ink would dry into the same colour as the way it looked when I first lay the ink to paper. The wet colour looks much better.
I would still this colour to be more or less work appropriate. I would love to try this ink on a broader nib or perhaps a flex nib.
This ink dries slower than the Take-sumi that I used previously.
This review is written using a TWSBI 580 F Nib on a Muji notebook.