Acid free, superior archival quality, heavyweight sheet is composed of 25% cotton. Pronounced surface lends itself to drawings and preliminary artwork designs. Contains 35 heavy duty sheets in each spiral bound book. ACID FREE Weight: 160 lb. (260 g/m²) Surface: Toothy, rough vellum surface on one side and a smooth surface on the other Media: Pencil, pen and ink, crayon, chalk, charcoal, pastel, and light washes Journal Qualities: Double wire binding creates a flat surface, allowing the art to flow across the page. Sturdy black chipboard cover can be personalized with acrylics to make your journal as distinctive as your artwork! Perfect for field work and micro-perforated for easy sheet removal. Proudly made in the USA.