• Pigmented India ink that is both acid-free and archival (PH neutral)
• Smudgeproof and waterproof when dry.
• Ink contains the highest quality pigments for unsurpassed lightfastness. Lightfastness rating and color name noted on barrel of each pen.
• Brush pens are ideal for graphic artists, illustrators, designers and architects.
• Perfect for sketching, journals, cartooning, fine-ink drawing, scrapbooking and rubber-stamping.
• For best results, pens should be stored horizontally.