Premium 100% Cotton Watercolor Blocks At An Affordable Price New York Central Watercolor Blocks come in 20 sheet blocks, Cold Press and Hot Press and are Ideal For wet and dry media, especiAlly Watercolor, gouache, ink, and fluid acrylic Paint. Made on a slowly rotating cylinder mould, the machine evenly distributes long cotton fibers to make Each durable sheet. Internal gelatin sizing prevents Paint bleed-through and preserves Color vibrancy. Each sheet has a balanced grain that softens as a unit when wet. The paper can withStand a multitude of techniques, including wet Color blending, paper scratching, and scrubbing. The rigid backing board supports the paper and makes plein air Painting simple. All four sides of the New York Central Watercolor Blocks are glued to prevent the top sheet from curling and buckling as you Paint. There is no need to stretch the paper before using it!