Fountain Pen Ink Cartridges Black

This pack of 10 black ink cartridges from Speedball is designed specifically for calligraphy. They work excellently with Speedball's own Calligraphy Fountain Pens or any other fountain pen with a universal 2.6MM ink port. After extensive research and testing Speedball has achieved an ink with the perfect balance of flow and opacity for calligraphy. They also improved on the end cap, adding a double seal that will not deteriorate over time, so your ink will still be good even if you put the pen down for anything from a few days to a few months.