Sketchbook Nova Mixed Media Gray Stillman & Birn 21.6 x14cm The color really pops in these mixed media tonal paper sketchbooks. Ideal for a wide range of dry and wet media, This 150 g/m² acid-free art paper supports multiple lint-free erasures and maintains the ink line without bleeding. The internal and surface sizing gives these papers notable wet strength and forces the pigment to stay high on the surface so the color shines. 46 sheets. Size: 21.6 x 14 cm. Brand: Stillman & Birn