The absolute finest quality, permanent artist pen. Reliable and even flow of ink; point glides softly and smoothly over the paper. Pigmented India ink is both acid-free and archival. Smudgeproof and waterproof when dry, the ink contains the highest quality pigments for unsurpassed lightfastness. Includes Superfine, Fine, Medium and Brush tips. Acid free. Conforms to ASTM D 4236. Imported.