Blue-black fountain pen ink by DeAtramentis, handmade in Germany.
- This ink is a duplicate of DeAtramentis Standard Dark Blue.
Rudolf Diesel, in full Rudolf Christian Karl Diesel, (born March 18, 1858, Paris, France—died September 29, 1913, at sea in the English Channel), German thermal engineer who invented the internal-combustion engine that bears his name. He was also a distinguished connoisseur of the arts, a linguist, and a social theorist. Source: Britannica
This ink is made by hand in small batches, therefore there could be some color variation between bottles of ink.