Artists know Arches Watercolor Blocks by Canson are the premier paper for plein air and studio painting. Available in hot and cold press, these top-quality papers are made from pure cotton fiber and are truly conservation quality, so you next work of art will last for ages without fading or yellowing. Watercolor blocks are made of stacked papers and have glued edges, so you work right in the pad and, after your finished, cut the pages from the block with a razor knife.