Invented in the 1980s, the Gelly Roll was the world's first gel ink pen. Since then, Sakura has continued to refine and improve their gel ink formula. This Gelly Roll Classic pen features rich, smooth ink that is archival, waterproof, fade resistant, and resistant to chemicals used to commit check fraud. The ink also resists feathering and bleed-through on most papers. Featuring opaque white ink, these pens are great for artwork and crafts.