Strathmore books are offered in an range of formats and paper choices to meet artists’ individual needs and preferences. Hardbound books have a lightly-textured, matte cover in dark chocolate brown. Flexible lightweight format in convenient, portable sizes. The Strathmore 400 Tones Mixed Media Book features a durable Smyth-sewn binding, allowing pages to lay flatter. A heavyweight paper intended for use with wet and dry media. This midtoned paper has been created specifically to work well with light and dark media. 100% recycled, contains 30% post-consumer fiber. Quality/Recommended: Recommended for professional artists and art students. Weight: 300gsm Acid free: Yes Made from: Wood pulp. Colour: Grey Ideal for: Ideal for use with wet and dry media. Texture: Medium Grain Brand: StrathmoreFormat (cm): 21.5 x 13.9 cm (approx.) Format (inches): 8.5 x 5.5 inches Sizing: Internally sized. Mould made: Made using a Fourdrinier Machine. A technique from the 19th century, allowing constant quality of the paper.