Stardust GellyRoll Pens are rollerball pens that contain a pigment-based archival-quality ink that is chemically stable, waterproof, and fade-resistant. The glittery dust of the pen is an inert, cosmetic-grade, finely ground glass, which produces the reflective brilliance. This pen leaves no smears, feathers, and does not bleed-through on most papers. Decorate your dark or light papers with lovely, shimmery colors!