Graphic pen is designed for making fine lines, shading, textures, and coloring in images. Write on fine papers like vellum. Ideal for graphic art, cartooning, sketching, illustrations, scrapbooks and fabric projects. The formulation of pigment-based inks is more complex and stable than dye-based inks. Archival-quality ink is permanent, fade-resistant, waterproof and chemical proof. Graphic pen will not smear or feather when dry and does not bleed through most papers. Meets ASTM and ACMI nontoxicity standard. Pigma Ink is not recommended for use on fabrics intended to be washed and has not been evaluated for cosmetic use on skin.