Rollerball pen fans have long appreciated this true classic. Writing as smooth as a fountain pen, but without the mess, it's been a favorite for decades! uni Super Ink, a pigment-based formula containing particles that form an indelible bond in paper that can't be broken.ever, protects against water, fading and fraud. In all ways, it's a pen you can rely on! Features an attractive matte finish and a durable metal clip.