Strathmore books are offered in an range of formats and paper choices to meet artists’ individual needs and preferences. Softcover books feature a velvety softcover in rich dark brown. Flexible lightweight format in convenient, portable sizes. The Strathmore 400 Tones Sketching Book features a durable Smyth-sewn binding, allowing pages to lay flatter. This sketch paper is ideal for light and dark media including graphite, chalk, charcoal, sketching stick, markers, china markers, coloured pencils, pens and white gel pens. 100% recycled, contains 30% postconsumer fiber. Quality/Recommended: Recommended for professional artists and art students. Weight: 118gsm Acid free: Yes Made from: Wood pulp. Colour: Grey Ideal for: Ideal for light and dark media including graphite, chalk, charcoal, sketching stick, markers, china markers, coloured pencils, pens and white gel pens. Texture: Medium Grain Brand: Strathmore Format (cm): 19.6 x 24.7 cm (approx.) Format (inches): 7.75 x 9.75 inches Sizing: Internally sized. Mould made: Made using a Fourdrinier Machine. A technique from the 19th century, allowing constant quality of the paper.