This block of watercolor paper is an art supply that isn't just for watercolor. Use this high quality paper for drawing, acrylics and an array of art projects. Suited for the classroom or a gift for artistic novices, this watercolor block paper will fullfill a variety of artistic needs. These convenient blocks of watercolor paper eliminate the need for stretching. Aquarelle Arches watercolor paper is acid-free, chlorine-free, and made of 100% cotton fibers for extra strength and stability and mould made. As the paper is tub-sized in natural gelatin and air-dried, it can take scrubbing, scratching, and erasing while keeping the original intensity of the watercolor. Arches uses no optical brighteners so its natural white color will not yellow with age. It is excellent for watercolor, gouache, pen and ink, acrylics, and calligraphy. Each block consists of sheets of paper pre-stretched, glued together along all four edges, and supported by a rigid backing. The top sheet is easily separated from the block by inserting a knife under the sheet and running it around the edges. Blocks of 140 lb. paper contain 20 sheets. Blocks of 300 lb. paper contain 10 sheets. 7" x 10".