Strathmore's Hardbound Art Journal offer artists more choices in a hardbound format, such as 500 Series mixed media paper, Smyth-sewn binding that allows the books to lay flat when open, and a lightly textured, matte, chocolate brown cover. Available in three sizes, these journals hold multiple sheets of 90 lb (190 gsm),acid-free, 500 series mixed media paper. Excellent for watercolours, gouache, acrylics, graphite, pen-and-ink, coloured pencils, markers, pastels, and collage. This professional quality paper is internally sized for wet media with a durable vellum finish for drawing techniques. 100% cotton fibre is lignin free and archival