Stonehenge Aqua Coldpress Black Heavy offers an exciting surface that is 100% cotton and sized for watercolor. Ideal for experimentation and luminous illustrations or paintings with metallic or pearlescent paint, ink or pencils, this paper has superior wet-on-wet performance, withstanding repeated wetting/drying over long periods of time. Instead of building up shadows, build up light, utilizing the negative space that a black surface provides. Lift, blend and layer colors as needed, with plenty of control; due to superior color holding properties, bright colors remain bright after drying. Details: Black 5'' x 7'' 300 lb. (600 gsm) 10 sheets pH neutral, acid- and chlorine-free Buckle resistant, durable surface 100% cotton Suitable with metallic and pearlescent watercolor paints, pencils, pens, markers and inks