Sakura - Gelly Roll - Moonlight Blue - Sakura Gelly Roll Moonlight Pens' brilliant colors seem to ignite the darkness, radiate emotion, and reflect the good times of life. Brighten up handwriting or artistic expressions for a playful, animated look. Gelly Roll Moonlight evokes the celebrations of days like Halloween, with a fluorescent element making the ink glow under a black light source. Reveal the inner heat and energy that words and image express for a sensational effect. Gelly Roll Moonlight gel ink pen features: A roller ball pen that is easy and comfortable to write with, archival quality ink û chemically stable, waterproof, and fade resistant. No smears, feathers, or bleed-through on most papers, it writes on vellum (a heavy creamy-colored paper resembling parchment) It's best effects can be seen on black paper but they can also be used on white paper. For fluorescent colors that glow under a black light source Gelly Roll Moonlight Pens are the best way to go.