Uni-Ball 1905406 Signo 207 Retractable Gel Pens, Medium Point, Black Ink, 12 Count Plus 2 Bonus Pens Uni Super ink is specially formulated to become trapped in paper, helping prevent criminal check washing and other document alteration. Textured grip provides superior writing comfort and control making this pen truly a pleasure to write with. Stylish metallic accents with a high-quality finish. Archival-quality, acid-free ink is quick-drying and fade- and water-resistant. Stainless steel, retractable tip for added convenience.