I excavated a semi-antique cardboard box today. Inks found...

[Claes]

R-ink-il was manufactured in Helsingborg/Råå (I believe), as late as the 1970s.

It is still fluid. The bottle says Kungsblått (which equals Royal blue, Köningsblau).

I visited that "factory" at the time; two entrepreneurs were busy in something

looking like a barn, filling water + dyestuff into bottles.

 

I just tested the ink on a Mellotex paper, using a stubbified J-pen.

 

Have fun!
Claes in Lund, Sweden

[Arch Prof Scott]

amazing that some of these inks were still wet! enjoy your new-found fun!

[Doc Dan]

That's great fun. 

[Misfit]

Cool find… again. 

[Claes]

Addendum: The contents of the infamous bottle far right (Parker Super chrome)

was not fluid, however. Instead, it had eaten a hole in the metal cap(!)...