Rohrer & Klingner - Document Brown (Dokumentus Braun)

[Thom.]

... Interesting. This seems like the worst ink possible:
What's the point of this ink, eternal dry times? ...

Clattering is part of the craft. That was the only example I could think of where the pigment/dye is described. With things like Pelikan Fount India, for example, I would also expect something like that.