I've never seen or heard of ink for "re-inking" typewriter ribbons. It would be an impossible job. The stuff dave2745 used must have been a tube of Zebrite (Grate Polish, that's mostly carbon black) or a tube of printers/fingerprint ink.
It was definitely a tube of typewriter ink because it stated this clearly on the tube itself, but you have to remember, this was back in 1964 (but that's not to say it was manufactured in 1964, it could've been much older than this). Whether it was for a specific make or model of typewriter, I could not tell you. Like I said, at the time, I didn't have the typewriter to go with the ink so I have absolutely no idea how it would be applied to the machine.
I would, however, like to pick you up on the point you made about it being impossible to re-ink a typewriter ribbon. I beg to differ because I have actually done this when I had my Olympia typewriter. Although, to be honest, I actually used rubber stamp pad ink to rejuvenate my dried up ribbon, but hey, it did the job and contrary to your claim, I actually found it relatively easy (albeit a bit messy).
I still had my old Olympia typewriter up until about three years ago. It was stored up in the loft and it weighed a ton. I decided as I wasn't likely to be using it ever again, I might as well get shut of it so off to the tip it went.
Lastly, apologies to yoller, this thread is supposed to be about May Queen Day, not typewriters!!!