Ideal for watercolor, gouache, acrylic, graphite, pen and ink, marker, pastel, collage, colored pencil and pouring mediums, this extra heavy-weight paper provides a premium mixed-media surface. The sheets are internally sized for wet media and have durable vellum finish for drawing techniques. Details: Available in multiple sizes 350 lb. / 570gsm 3 ply 12 sheets Vellum finish Archival quality Acid free 100% cotton