The Diamine Ink Co have been ink manufacturers since 1864 and have upheld their reputation for producing the finest quality of fountain pen inks, calligraphy inks, drawing inks and writing inks. Imported from the UK, we are proud to offer the full line of Diamine colors in 30mL bottles, with some colors also being offered in international size ink cartridges (18 per package) and as value-sized 80mL glass ink bottles.