About 1834 Henry Stephens began manufacturing, "A carbonaceous black writing fluid which will accomplish the long desired and apparently hopeless task of rendering the manuscript as durable and as indelible as the printed record." Modern fountain pen ink is a descendant of these early formulations.
Pen Refills, Writing Ink and Pen Converters

Waterman Ink & Refills
Waterman Ink, Cartridges & Converters
All Fountain Pen Converters