The first 100% cotton black watercolor paper: Stonehenge Aqua Coldpress Black. Black paper is not a new thing, but black 100% cotton paper sized for watercolor is. Black paper is an exciting, new world. Instead of building up shadows, one builds up light. It’s a place where negative space is transformed into positive. And while it may be dark, it’s a chance for those who live and breathe watercolors to bring a new breed of creativity to light. Paper is 100% Cotton, Neutral pH, Acid Free and Chlorine Free. Ideal for calligraphy; intaglio; letterpress; pen and ink; pastel and charcoal; silkscreen; and watercolor.