Canson Montval Paper - Rough / Snowy Grain - 270 GSM 29.7 x 42 cm or 11.7'' x 16.5 Pad - 12 Sheets an acid-free watercolour study paper. Extremely easy to use and containing no optical brightening additives this paper is the ideal companion to an artist wishing to express themselves with wet techniques. The paper is suitable for all wet techniques: watercolour, gouache, acrylic.