Stonehenge is a 100% cotton rag, acid-free, heavy-weight paper that is machine-made in the USA. This versatile fine art paper offers a smooth, even surface with a slight tooth that resembles vellum. Ideal for a variety of media including etching, silkscreen, drawing, watercolor, printmaking, pen & ink, pencil or pastel. There are 15 sheets of 90 lb. (250gsm) paper per pad.