BAOHONG Artists‘ Watercolor paper is made from 100% cotton. It is 140lb/300gsm. Watercolor papers made from cotton would hold more color and with perfect water absorption. The heavyweight watercolor papers is acid-free and chlorine-free, pH-neutral and archival, durable. BAOHONG Academy Watercolor paper is strong and durable for whether wet, dry or mixed media painting, and less likely to curl or warp. The Postcards in a box have multiple texture papers for artists to paint. - Textured Cold press x 16 pcs The Cold-pressed watercolor papers have a slightly textured surface, which is between that of rough and hot-pressed papers, allowing for a variety of watercolor techniques. - Smooth Hot Press x 2 pcs Hot-pressed watercolor papers come with a smooth surface which is ideal for painting fine details, and watercolor papers made from cotton would hold more color and with perfect water absorption - Rough x 2 pcs The rough finish has an effect close to that of handmade paper. This rough grai