100% cotton hot press paper with a coating on both sides for extra versatility. Features an ultra smooth finish on two sides that is optimized for Epson Photographic Dye, Epson UltraChrome and Archival Inks. Acid-, lignin-, and chlorine-free, it is also pH buffered with calcium carbonate for a true archival sheet. Engineered to give you the highest resolution and color saturation possible.