Canson Montval is a fine quality, acid-free, natural white, mildew resistant watercolor paper. It is offered in blocks that are bound on all four sides, which prevents curling of the sheet and eliminates the need to tape it down to another surface. When completed, your art can be removed with ease from the block with a standard razor blade. The block is convenient for both studio and field use. 15-sheet blocks. 140 lb (300 gsm) Cold Press.