BAOHONG Academy 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 Watercolorpaper is strong and durable for whether wet, dry or mixed media painting, and less likely to curl or warp. 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. 20 sheets per pack and all these papers are glued bound for easier tearing off, and a hardboard underneath for better protection and control. The 16K watercolor pad, 10” x 7” in size, perfect size to take with in travel.