Number 18: In Which Dr. Inkenstein Is Baffled, Though Pleasantly Surprised

Dr. Inkenstein is by no means a Poiple Ink lover, but some of them do appeal to me. This ink is one of them (the other, not suprisingly, is also a MI, but an earlier one, with 'Aubergine' in its name.)

The chroma showed no complexity, and I saw no shading or sheen, but it DOES go down with a reddish tint that vanishes almost on contact, leaving a sort of periwinkle tone very similar to those Rhodia dots.

No guesses this time...but the ink was revealed as Akkerman (coolest inke bottles ever) Parkpop Purpur.  And continued thanks to FPG Scooby for letting us in on the fun.