Sketchbook Beta Mixed medium Black Stillman & Birn 15x20cm Beta series padded notebook for multi-technique drawing. One of the three thickest papers in the range, the Beta series allows artists to dip their sketchbooks in water or pigment and explore bold new techniques. Extra thick fine grain 270g/m2 paper with white dye. Perfect for dry and wet techniques, ink, watercolor and multi-techniques. Color of the caps: black. Acid-free, neutral pH. Size: 15.2 x 20.3 cm. Brand: Stillman & Birn