Saunders Waterford Watercolour Blocks contain 12 sheets of high quality, archival, 100% cotton watercolour paper. All four edges are gummed and the paper is buffered with calcium carbonate to prevent discolouration. Gelatin sizing provides added strength and durability enabling multiple watercolour washes. Saunders Waterford Watercolour Blocks are also suitable for gouache, acrylic, pastel, pen and ink, pencil, charcoal and printmaking. Available in Hot Press (Smooth), Cold Press (Medium Texture) and Rough (Heavily Textured).