I am really uncertain as to how I began two entirely separate review sheets for this ink, but, here you have it, two separate review pages of Platinum Blue-black ink! As hinted in the review, it is less teal than Diamine Blue-black. The comparison to a midnight blue came from remembering how Noodler's Midnight Blue looked, when it was thinly applied to the page. On the sheet, where I refer to "...they are both blue-blacks...", I believe it is the Diamine and the Platinum about which I am talking.
This scan was done on an HP Deskjet F4280 at 600dpi.
Because these scans are done with a light emitting printer, actual
colors will, more likely than not, be slightly darker than they may
appear, here. The
colors shown, here, are probably a bit more reminiscent of what the ink
would be like under a bright light or if it were held up and viewed
with a light behind it.