Pentel Sign Pen Pigmented Ink Black - Fiber-tipped pens with either a fine acrylic, brush, or micro brush point. The fine tip is ideal for use in the home office or studio for writing, sketching, and coloring and a favored by architects and designers. The brush tip is great for a variety of techniques including feathering, cross-hatching, calligraphy, detailed line work and outlining. Brush tip wipes clean with a paper towel and will not dry out if left uncapped. The micro brush tip is ideal for drawing, detailing, lettering, and journaling. Available with water-soluble or pigmented ink. The special water-soluble ink always flows evenly and guarantees the smoothest writing possible. The permanent pigmented ink is acid-free, fade-proof and water-resistant.