Thanks for another nice ink review, TNS!
As Kurt mentions, this looks rather different from my copy of Ottoman Azure. I think I started doing a review a long time ago, but never finished it. If I do get a chance, I'll post a copy up here, too, to show the colour difference. Apparently this is one of the most difficult colours to make, and batches may look quite different from each other.
I just love this ink. And so does my 1.1 italic nibbed Etruria d'Inverno

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Warm regards, Wim