What's in the box: Fabriano Artistico tradiwhite bloc4co 20 F Grn Torch 23x30,5 The "Traditional White" building blocks are glued on all 4 sides, thus avoiding paper bowing when it is wet. They are available in 300 g and in three textures of grit fine surface (Silk and photo). The blocks have 10 to 25 sheets for each 5 sizes. These Fabriano Artistico Watercolour Blocks are 300gsm/140lb mould made, 100% cotton, chlorine and acid free. Quite simply this is the finest paper manufactured by the Italian paper mill. It contains no optical brighteners or chlorine, is acid free and pH neutral and therefore is highly 'work' and eraser resistant. The internal and surface sizing makes for perfect colour take up and allows for all watercolour techniques. Glued on all four sides there is no need for soaking or stretching. Size 23 x 30.5cm (9x12ins). Rough finish for a textured surface. This paper is suitable for watercolour, gouache, acrylic, ink, charcoal and drawing. 20 sheets.