Gelly Roll Stardust rollerball pen contains 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. No smears, feathers, or bleed-through on most papers. The 1.0mm ball writes a 0.5mm line on dark or light papers. Meets ACMI nontoxicity standards (AP seal). Ink is not recommended for use on fabrics intended to be washed, on foodservice or ceramics that are washed, and not evaluated for cosmetic use on skin.