Extra Heavyweight: 270 gsm Shade: White Surface: Smooth Media: Dry & Wet Media, Watercolor, Ink Only Stillman & Birn offers a sketchbook system that gives artists the choice of paper weight, shade, and surface type best suited to their specific techniques. With both internal and surface sizing, our papers have exceptional wet strength that supports the application of multiple washes. Similarly, just as the paper's sizing retards water absorption, pigment stays on the surface of the sheet. The result: remarkably glowing color Stillman & Birn bindings are equally rugged. Our hardbound bindings - stiff when new - are designed to be broken in. The spines get eased in and then lay completely flat, accommodating both two-page drawing layouts and flatbed scanning. Bound in the United States, our sketchbook system offers artists a choice of three paper surfaces: Medium Grain - distinctive tooth, suitable for all dry media, and will also accept multiple washes Cold Press - Substantial tooth, enhanced wet and tear strength, suitable for mixed media artwork Smooth - Suitable for pen & ink, colored pencils, water-based markers as well as watercolors