Paint marker writes on glass, wood, porcelain, plastic, paper and metal. Ideal for invitations, cards or custom stationery. Ink flows from the chamber directly to the tip of the marker. A quick shake before writing mixes the color. Archival-quality ink is low-odor, xylene-free, chemically stable, waterproof, and fade-resistant. Not recommended for use on fabrics intended to be washed. Not evaluated for cosmetic use on skin. Meets ACMI nontoxicity standards.