Monteverde Blue Black from Monteverde's standard collection is a dark blue black fountain pen ink with a purple undertone and medium shading. It dries in 20 seconds in a medium nib on Rhodia paper and has a wet flow. Monteverde inks feature ITF, which drastically improves ink-flow quality, extends cap-off time, and lubricates and protects the ink feeding systems from corrosion and clogging.