Studio Series - Watercolor Paper BlockThe perfect pad for painting anywhere! Paper is sealed on all four sides, so your watercolor paintings will never warp. When your latest painting is dry, simply lift the top sheet away using a palette knife. Use with watercolor and gouache paints. 20 sheets. Heavyweight 250 g m2 (90 pound) acid free archival quality paper. 20% cotton content enables subtle and dynamic watercolor techniques. Fine textured cold press finish is easy to work with.