Heavyweight, 25% cotton sheet. Extremely creamy paper. Heavyweight chipboard back allows field use without buckling. Each sheet has a rough vellum front with a smoother surface back. Elegant and extremely sturdy texture stamped and foil stamped front cover. Side double pewter metal spiral binding. ACID FREE Weight: 130 lb. (211 gsm) Color: Creamy Surface: Toothy, Rough Vellum side, Smooth Side Media: Pencil, Charcoal, Ink, Acrylics, Pastels, Oil Pastels, Watercolor Pencils, Watercolor (Light Washes), Tempera 50 Sheets