Rohrer & Klingner Blau Permanent (Blue) Ink Size:3mL Sample and the classic octagonal profile

and the classic octagonal profile make it tough enough for daily carry yet refined on the desk

Built from weather-resistant

Ideal for Hobonichi Cousin

Noodler’s 54th Massachusetts is a professional-minded fountain pen ink inspired by the famed Civil War regiment

Rohrer & Klingner Blau Permanent (Blue) Ink Size:3mL Sample and the classic octagonal profileRohrer & Klingner Blau Permanent is a beautiful muted dark blue color. This is one of my favorite "business friendly blue" fountain pen inks, because it's so well behaved, even on cheaper, lower quality (non fountain pen friendly) paper. Despite its name, this is NOT a permanent pigment ink, but rather a dye based ink (I wrongly believed that it was waterproof for a time, before realizing that my life was a lie). This ink is made in Germany.