Fluid Watercolor Paper easy-block - It's the watercolor block that’s bound in a fresh, innovative way! Easy-Blocks are glued on two edges (instead of the traditional four) allowing you to paint right on the block without the need to stretch or tape the paper. The paper stays flat and will not twist or curl while you paint. Once your painting is dry, the top sheet easily separates from the block revealing a fresh sheet beneath. Acid-Free. 140 lb. Cold Pressed, 15 sheets per block.