Strathmore 400 series watercolor art journals feature intermediate grade watercolor paper with a strong surface that is ideal for watercolor, gouache and acrylic. The natural white color and traditional cold Press surface allows for fine and even washes, as well as lifting and scraping applications. Acid free, 140lb paper, inside a lightly textured matte Dark Chocolate brown cover with smyth-sewn binding which allows for the pages to lay flatter. 48 pages per book.