I assume this is a 1-liter bottle of ink, but there is no measurement listed on the label.
I have had several inquiries... YES, this ink works perfectly well — and is a true permanent deep black ink (turns dark black) it is registrar ink, meaning that it has to be certified to be permanent and long lasting for official government record keeping, etc. I have been using vintage ink for many years now for both my fountain pens and with my dip pen nibs, and it has worked perfectly everytime. If there is some sediment in the bottle it is due to evaporation, and it will settle at the bottom of the bottle, so pull your ink from the top.
Note: The bottle of Pelikan ink in the photos is there for size comparison. This ink is permanent and dries a dark black as it oxidizes with the air. The ink will well sealed, wrapped and shipped in a medium flat rate box through USPS.
I am currently selling off my collection of inks. So stay tuned...