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. The brush retains its shape even after constant use. By varying the angle, you can achieve script, fine, medium and broad strokes. Shading of various kinds is possible. Store horizontally.