These Sakura Pigma Micron Brush Pens have ink that is fast-drying, pigment-based, fade-resistant, and waterproof once dry, making them permanent. The ink is also bleed proof on most papers and will not smear or feather when dry. · Brush nib · This pack contains the following ink colours: black, red, blue, green, orange, brown, rose and purple · Waterproof and fade resistant · Odourless, non-toxic and acid-free · Permanent - archival quality pigmented ink · Ink dries quickly - making it perfect for left-handers · Bleed proof ink won't feather or spread when applied to paper · Ink does not bleed through the thinnest paper · The barrels feature a convenient pocket clip · Flexible brush nib that creates varying strokes and thickness · Ideal for creating technical drawings, artistic illustrations and journaling · Made in Japan