The Fluid 100 Cold Press 300 lb (640 gsm) Easy-Block contains 10 sheets of premium, archival 100% cotton watercolor paper bound on two sides. Unlike any other, Fluid 100 is made by European mill masters who have combined their traditional paper making techniques with modern technology. The process has resulted in beautiful, acid-free natural white sheets that are strong with subtle yet pleasing surface textures. The gelatin sizing allows an artist to have greater control, producing brilliant and intense color. Paint directly on the Easy-Block without the need to wet or stretch. MADE IN USA.